Cellulose Extraction Thimble VS Glass Fiber Extraction Thimble

Established in 2010, Hawach is dedicated to providing special applications, advanced laboratory equipment sales, and services. The years’ experience has laid a solid foundation for HAWACH’s position in the sample pretreatment, gas samplers, soil and water samplers, laboratory and life science filtration, etc.

Hawach’s philosophy is to provide customers with high-performance instruments, high-quality customized solutions, from sales to rapid customization services. Hawach has two kinds of extraction thimbles, based on their different materials–cellulose extraction thimbles and glass fiber extraction thimbles.

1. What is cellulose?

Cellulose is a macromolecular polysaccharide composed of glucose and it does not dissolve in water and common organic solvents. Cellulose is the most widely distributed and most abundant polysaccharide in nature, accounting for more than 50% of the carbon content of the plant kingdom. Cotton has a cellulose content close to 100% and is the natural source of the purest cellulose.

Hawach cellulose extraction thimbles

Hawach cellulose extraction thimbles feature consistent high porosity which ensures fast flow through and high fitting accuracy for all available extraction systems. It is used in general Soxhlet extraction and indoor dustfall, indoor toxic organic matter (phthalic acid).

What is glass fiber?

As an inorganic non-metallic material, glass fiber features excellent performance, good insulation, heat resistance, good corrosion resistance, and high mechanical strength. It is a good substitute for metal materials.

Glass fiber has become an indispensable raw material for the construction, transportation, electronics, electrical, chemical, metallurgical, environmental protection, national defense and other industries, thanks to the rapid development of the market economy. Glass fiber has received increasing attention, with the wide application in many fields.

The global fiberglass production and consumption countries are mainly developed countries such as the United States, Europe, and Japan, and their per capita glass fiber consumption is relatively high. Europe remains the largest region for fiberglass consumption, accounting for 35% of total global use.

Cellulose Extraction Thimble VS Glass Fiber Extraction Thimble

Why QuEChERS Is Getting More And More Popular?

QuEChERS are widely used in sample handling before food safety inspection. And food safety inspection is vitally important to our life and health. Today, here we are going to talk about the QuEChERS rationale and some relating aspects.

Pesticide residue analysis

Pesticide residue analysis is a complex trace analysis technique. The traditional pretreatment methods mainly include soxhlet extraction, oscillatory extraction, liquid-liquid partitioning, column chromatography, and centrifugation. These methods have the disadvantages of single sample extraction, long purification time, the large amount of toxic organic solvent, low sample recovery rate, and large impact on human health and environment, which can not meet the needs of pesticide analysis in modern batch foods.

At the same time, the composition of various foods is complex, which increases the difficulty of analysis and puts forward more stringent requirements for pesticide residue detection technology.

New technologies

At present, new technologies that have been reported or have been widely used include solid-phase extraction SPE, solid-phase microextraction SPME, supercritical fluid extraction SFE, ultrasonic extraction USE, microwave-assisted extraction MAE, rapid solvent extraction ASE, matrix solid-phase dispersion extraction MSPD, gel permeation chromatography GPC, molecularly imprinted synthetic receptor technology MISR, and the like.

Why QuEChERS Is Getting More And More Popular?

Use Instruction Of Bottle-Top Dispenser

Hawach bottle-top dispenser is usually used by being fixed on the sample vials through the screw valve. Due to the tight and stable sealing, the removal process of the sample solutions is in a closed system. It could effectively avoid the occurrence of evaporation, splashing, tipping, etc.

Package and Delivery of Bottle-top Dispenser

Bottle-top dispenser offered by Hawach Scientific formulates a complete delivery process and reliable package. In the transportation process, all products are packed with hard cartons and thick foam for safe delivery.

Once customers choose the appropriate one based on timeline and budget, ordered products will be delivered as soon as possible, because Hawach has got the unique geographical advantages and convenient transport network. Besides, detailed inspection and delivery plan will be submitted to clients before delivery, to guarantee the package meets the requirements, and delivery is safely and quickly.

Specification of Bottle-Top Dispenser

Hawach Scientific bottle-top dispenser is a convenient device to facilitate the removal of a fixed volume of liquid from other storage bottles. And it can perform accurate and highly repetitive liquid separation without wasting reagents.

Details on Hawach Scientific bottle-top dispenser are provided as follows, the maximum pressure resistance is 500mbar, the maximum viscosity resistance is 500mm, the maximum operating temperature is from 10 to 30 degrees Celsius, and the maximum piston lift is 10ml, the volume range is from 0.1 to 99.9 ml.

Performance of Bottle-top Dispenser

Hawach uses high-grade chemically inert materials to ensure the purity of reagents, which is compatible with a wide selection of samples and is autoclavable for diverse applications.

Use Instruction Of Bottle-Top Dispenser

Operation Manual Of Syringe Filter

Hawach Scientific Syringe filter is a rapid, reliable and convenient filtration tool commonly used in laboratory. It is of beautiful and light appearance and high cleanliness. It is mainly used for sample pre-filtration, clear removal of particles, liquid and gas and so on. Hawach syringe filter is the preferred method for filtering HPLC and GC small samples. In application, it does not need to change membrane and clean filter, which greatly saves complex and time-consuming preparation work.

Material of Syringe Filter

Hawach syringe filter is divided into three types, each type is made of different materials, but all of them are of high quality and strict manufacture process. The filter material includes nylon (Nylon), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), mixed cellulose (MCE), cellulose acetate (CA), glass fiber (Glass Fiber), polypropylene (PP), polyethersulfone (PES) and 100% Borosilicate glass.

Combined with ultrasonic welding and heat fusion technology, Hawach syringe filter provides with extremely low extractable levels, widest range of chemical compatibility, superior temperature, corrosion and pressure resistance, excellent light transmission, soft texture and easy processing structure.

Improvements of Syringe Filter

Hawach always spends great efforts to improve performance of syringe filter, thus the filter membrane is free of damage and defect, and the selected filter membrane meets the filtration requirements. The correctness of filter installation and operation in the process is given high priority, and satisfy the standards provided by the manufacturers.

Additionally, the sealing property of the filter perfect and there is no gap between the filter membrane and the filter. All syringe filter can stand 100% optical integrity test and CE double recognition.

Operation Manual Of Syringe Filter

How To Choose A Sample Vial When Doing An Experiment?

When there is a problem with our experimental results, we always think of the sample vial in the end, but it is what we should consider first. When choosing the right vial for your application, you need to make three decisions: the capping pad, the cap, and the vial itself.

1. About the choice of Inner cap pad
PTFE
Recommended for a single injection
Excellent solvent resistance and chemical compatibility
Will not reseal after piercing
Long-term sample storage is not recommended

PTFE/silica gel
Recommended for multiple injections and sample storage
Excellent resealing characteristics
Chemical resistance to PTFE prior to piercing. After piercing, the capping pad will have chemical compatibility with silicone
Working temperature: -40 °C to 200 °C

Pre-cut PTFE/silica gel
Provides good ventilation to prevent vacuum in the sample vial for excellent sample reproducibility
Eliminate clogging of the bottom needle after sampling
Good resealability
Recommended for multiple injections
Operating temperature is the same as PTFE/silica gel

How To Choose A Sample Vial When Doing An Experiment?

The General Guidelines Of The Flash Column Chromatography

When flash column works, the upper interface generally has a gas/liquid (with a certain pressure) to speed up the sample separation process. It operates at pressures of 50 -200 psi, as compared to HPLC, which operates at 1000s of psi, and UHPLC which operates above 10,000 psi. Flash column is the primary purification technique used in organic synthesis and industrial applications because it is fast (Flash!), it is easy to use and it is versatile. 

The method of the flash column chromatography is to separate the components from the mixture and purify it. In short, fast column chromatography makes samples go through gel-filled columns, and the gels help make the separation. The founders of the fast column chromatography at first wanted to find a method to overcome the shortcomings of long column chromatography, such as time-consuming and low recovery.

The gel used initially for packing columns is silica gel, which is still widely used. People push solvents through silica gel flash columnsby air pressure. And then they add the samples in it and push samples through the columns. The components needed to be collected and purified will appeared during the process of the elution.

Since the silica gel, flash column chromatography is widely used in organic chemistry, the guidelines are important when you try to get better sample quantity results. The flow rate depends on different column length and width, and the properties of the gel as well.

The General Guidelines Of The Flash Column Chromatography

HWVT-0150 Oil-Free Corrosion Resistant Spiral Vacuum Pump

The disposable vacuum filter is an optional alternative to the solvent filter. Generally, it consists of a diaphragm, graduated polystyrene (PS) funnel, and a collection bottle. It is basically used with a diaphragm vacuum pump, which provides pressure differentials for sample filtration.

Advantages

Compared with other solvent filters, the disposable vacuum filter saves lots of trouble of cleaning and sterilizing for the operators, since it is packaged in a sterile and individual way. More importantly, its large filter area allows faster filtration of large amounts of samples. The pre-filtration layer made of the glass fiber membrane increases the filtration rate. Its spacious and well-designed bottle mouth ensures an effective and stable pouring of the sample. Meanwhile, the subsequent sample can be directly stored in the collection bottle.

Application

The disposable vacuum filter is of great use in the biopharmaceutical industry analysis. It could be applied in the separation and purification of large-volume samples. It is ideal for filtering tissue culture fluids, biological fluids, antibodies, etc. Also, it is suitable for the sterile filtration of solutions that cannot be sterilization with high pressures or temperatures. The difficult-to-filter aqueous solution is also quite available to use this disposable vacuum filter.

Equipped with a set of the manual vacuum control valve (control vacuum from 0.1mbar to atmospheric pressure).

HWVT-0150 Oil-Free Corrosion Resistant Spiral Vacuum Pump

About The General Classifications Of Filter Cartridge

The filter cartridge has played an important role in the filter. It can be classified into many types, like the common string-wound filter cartridge, folding microporous filter cartridge, and compressed activated carbon filter cartridge, etc.

String wound filter cartridge

It is made by textile fiber yarn with excellent filtering performance precisely twined on a porous framework, which can effectively remove particulate impurities and suspended solids of various liquids, and has a high purifying effect on various liquids.

Folding microporous filter cartridge
It adopts polypropylene thermal spray fiber membrane, filter end cap seal and integral structure connection which are made by hot melt bonding. Taking the Nylon polytetrafluoroethylene microporous membrane and other precision filtration devices as filter media have the advantages of large filtration area, small volume, and high precision. Filtration accuracy can range from 0.1μm to 60μm.

Compressed activated carbon filter cartridge
This kind adopts coal adsorption activated carbon and coconut shell activated carbon with high adsorption value as a filter material and is sintered and formed by a food-grade binder. The inside and outside are wrapped with a layer of non-woven fabric to ensure that the carbon core itself will not drop the carbon powder, and the carbon core is equipped with a soft nitrile rubber gasket at both ends to make it packed into the filter cartridge for good sealing.

Service life

In general, the PP filter cartridge needs to be replaced in 3 months, and the activated carbon filter cartridge needs to be replaced in 6 months. As the hollow fiber filter cartridge can not be cleaned, it is generally placed at the back end of PP cotton and activated carbon to degerm. It needs to be replaced in 1-2 years. Ceramic filter cartridges can generally be used for 10-12 months, and high-quality ceramic filter cartridges can be used for 3-5 years or even longer.

About The General Classifications Of Filter Cartridge

Cleaning Methods Of Membrane Filter

The main application of membranes filter is the filtration of air, gases or chemicals. Membrane filters provided by Hawach have excellent chemical compatibility so that they are also used for the filtration of solvents and acids, to which other filter types are not resistant.

Moreover, it is available in pore sizes from 0.1 um to 10 um and multiple diameters, and therefore excellently suited for the particle removal from solvents. Besides, there is no worry about contamination because all of them are made in a cleanroom. Longer lifetime is guaranteed by fresh sterilization and good thermal stability.

Tips for Membranes Filter

There are some tips for type-selection. Nylon membranes filter is fit for filtration of aqueous biological solutions, alcoholic solutions, and non-aqueous HPLC/GC solvents, it is therefore recommended for the chemical industry. Sterile MCE grid membrane filter is not normal mixed cellulose esters membrane, its special color contrast provided by the membrane surface is good for particle detection and bacteria recovery, and the membrane filter provides with a high degree of the internal surface area for adsorption of solvents, so it is also suitable for food and beverage test applications.

After a period of use, the membrane filter will be contaminated or blocked, which will decrease the water permeability and the filtration speed. Therefore, it is necessary to clean the membrane filter in time to prolong its separation performance and the water flux. Here below are the two most common and effective cleaning methods.

Cleaning Methods Of Membrane Filter

Five Classifications Of HPLC Column

Used in analytical chemistry, a high performance liquid chromatography(HPLC) column is the column that can separate out components from the liquid sample. when liquid samples pass through the HPLC column, depending on how they interact with an adsorbent material packed inside the column, analytes elute at different times. For the highest pressure resistance, HPLC columns are usually constructed of stainless steel.

The Hawach HPLC column can not only meet our worldwide customers’needs of fast HPLC separation, but the traditional methods within the pharmaceutical, environmental, clinical, and food industries as well.

The particle platforms which make up the Hawach HPLC columns are monolithic silica, polymeric, monodisperse silica, ultra-pure silica, and zirconia. With the whole set the different products, you can always find the right ones for your application.

Hawach has a tradition of making innovative HPLC Columns with high column efficiency, excellent shape peaks and low pressure for a longer lifetime. And you can find Hawach C18 Universal HPLC column doing the same good performance as Waters, Agilent, and GL Science.

High performance liquid chromatography (HPLC) columns can be roughly divided into five categories.

1.High performance reversed-phase liquid chromatography column
It is extremely widely used in drug metabolism and kinetics, life sciences, medical health, bioanalytical testing, drug, and stimulant testing, food safety analysis, environmental analysis, military, homeland security, etc. It is also one of the most important separations and purification technologies.

2.High efficiency normal-phase liquid chromatography column

It is the earliest chromatographic mode. Until now, further purification through silica gel column after synthesis is still an important part of the daily work of organic chemists. In theory, almost all organic compounds dissolved in n-hexane, ethyl acetate or isopropanol can be analyzed by high performance normal phase liquid chromatography.

Five Classifications Of HPLC Column

About The Specifications Of Hawach SPE Cartridges

About Hawach

Hawach focuses on scientific instrumentation, manufactures high-quality instruments, and interprets perfect service. Hawach is committed to the research of safe nutrition and scientific analytical instruments and analytical methods for chemical, food, and medicine, providing instruments and comprehensive solutions for scientific and technological workers.

SPE cartridges

With the improvement of analysis level, in order to meet the requirements of sample pretreatment, SPE technology is obviously superior to traditional liquid-liquid extraction technology: convenient environmental protection, good reproducibility, time, labor and solvent saving, which has been widely used in organic synthesis, biology chemical, environmental, pharmacological, food, pharmaceutical, public inspection, import and export testing in all areas.

The various specifications of SPE cartridges provided by HAWACH are stable and reliable, suitable for different volume sample processing, and different specifications for easy method screening. SPE cartridges can also be processed according to customer needs.

Structure of SPE Cartridge

Hawach SPE cartridge is composed of several parts, including cartridge pipe, screen pipe, absorber, adapter, sample storage device and other supporting devices. Thereof syringe-shaped column pipe is a carrier of absorbents, made of learn grade polypropylene and provided with standardized dimensions or sizes, can be used in a multi-tube vacuum device. The screen pipe acts as a fixed absorbent and filter solution. The absorber is substances that play a role in separation. The adapter is used to connect the column pipe and column pipe, column pipe, and sample storage device.

About The Specifications Of Hawach SPE Cartridges

Three Skills When Using Pipette

A pipette is an indispensable tool for the experimental operation in the laboratory. It is important to reduce the experimental error to the minimum and improve the repeatability to best.

Factors Affecting The Accuracy

The first thing should be noticed is the accuracy of the pipette during the experimental process. There are mainly three factors that would affect its accuracy in varying degrees. The first common factor is temperature. The air will be expanded when its temperature is higher than the room temperature, which would cause the occurrence of the error when inhaling the cold solution.

The second factor is airtightness, which is caused by the long-term wear of the internal cylinders and the joint between the tip and the pipette body.

The third factor is the volatilization of reagent. When drawing the high-volatility reagent to the pipette, the steam will enter the tip and the internal pressure will be increased.

Consequently, the pressure will be higher when the sample is pressed out, which causes an error to occur. The error could be reduced by repeatedly pumping the pipette 4-5 times.

Three Skills When Using Pipette

The Necessity Of Adopting QuEChERS Method

Pre-treatment is the longest and most labor-intensive part of food testing. The quality of pre-treatment determines the accuracy and precision of the analysis. QuEChERS method is a kind of high-precision sample pretreatment technology because it is quick, easy, cheap, effective, rugged and safe. It uses the adsorbent filler to interact with impurities in the matrix to adsorb impurities to achieve impurity removal.

Main steps

The main step of the method is to extract the sample with acetonitrile containing 1% acetic acid, and then add anhydrous magnesium sulfate and sodium acetate to oscillate it to stratify, followed by dispersion solid-phase extraction, that is, the extract is transferred to PSA-containing adsorption.

In a centrifuge tube of magnesium sulfate, centrifuge with a Teflon-coated centrifuge tube, centrifuge the solution to an autosampler for GC/MS or LC/MS and analyze and evaluate its stability and reliability. At the same time, the method can be appropriately adjusted according to the type of analytical instrument available, the limit of detection, the range of the target pesticide, and the difference in the medium used.

Pesticide residues

Pesticide residues are a general term for all derivatives of pesticides and their toxicologically significant impurities, metabolic conversion products, and reactants that remain in organisms, agricultural products, and the environment due to the application of pesticides. The composition of agricultural products and food samples is complex.

The pesticide residue content is extremely low, generally in ppm and ppb, and there are also the influences of pesticide homologs, isomers, degradation products, metabolites, and conjugates. To remove the target simultaneous impurities, reduce chromatographic interference peaks, and avoid contamination of samples by detectors and columns, pretreatment is very important, accounting for about 70% of the workload.

The Necessity Of Adopting QuEChERS Method

Two Major Uses Of Extraction Thimble

Extraction thimble provided by Hawach Scientific is of good filtration performance, which is characterized in high chemical purity, good liquid absorption and perfect retention rate. Hawach is available in many kinds and wide applications for extraction thimble, especially for glass fiber type and cellulose type of extraction thimble.

Both of them are excellent in consist of wall thickness, extraordinary mechanical strength and retention ability. Additionally, both of them provide with uniform high porosity which guarantees the fast flow-through the operation.

Summary of Extraction Thimble

Extraction thimbles available by Hawach Scientific are of a variety of dimensions to fit most extraction units. Hawach extraction thimble is either manufactured with high purity borosilicate glass fibers or high alpha cellulose, which is commonly used in Soxhlet extractors for safe and efficient solid and semi-solid material extraction.

The smooth interior surface and consistent wall thickness are easy to clean and maintenance. All products are manufactured in a clean environment to avoid contamination or pollution from the source. Purify and accuracy of analytical results from the reliable and strict control systems and production lines. And the high fitting accuracy if fit for all Hawach’s extraction system.

Usage

The extraction thimble is mainly used to place the substance to be extracted in a container of the glass below, and then the solution is repeatedly soaked to extract the desired components from the material (for example, extracting pesticide residues from the pepper), the experimental procedure is called Soxhlet extraction.

Two Major Uses Of Extraction Thimble

The Storage And Repair Of Bottle-Top Dispenser

Hawach bottle-top dispenser uses high grade chemically inert materials throughout the whole manufactured process. The dispenser can be screwed directly onto reagent bottles with matched screw threads, and other bottle types can be connected with the provided adapter.

Replaceable filling and discharge valves supply quick and convenient servicing and maintenance. And discharge tube is slotted to guarantee proper orientation upon replacement and maintenance. What’s more, the self-sealing multi-layer piston has simplified whole maintenance and management.

Features

The bottle-top dispenser could be suitable for any reagent vials in the laboratory, which is provided with all optional sizes. It is designed with a precise scale and volume setting.

Moreover, it is qualified with strong chemical resistance, which could be applied in the experiments engaged with strong solutions and can be sterilized by high temperatures. Generally, it could cover a range of 0.5-50ml capacity. Its convenient design ensures simple and economical cleaning and maintenance for itself.

The unique design of the bottle-top dispenser

Hawach bottle-top dispenser is of built-in features, which comprises a safe system with closure cap and discharge tube to avoid potential spilling or dispensing. The slotted discharge tube guarantees correct installation and safe operation in practical applications. The inner glass piston is enclosed in an inert polypropylene sleeve so as to avoid accidental damage and permit smooth operation.

What’s more, flexible dispensing options can suit different application workflows. Accessories changing process is easy and fast such as tube discharging and filling procedures. And fixed and flexible discharge tubes are available in diverse sizes to meet all kinds of meets.

The Storage And Repair Of Bottle-Top Dispenser

Difference In Hawach Quantitative And Qualitative Filter Papers

Filter paper is used to separate solids from fluids by interposing a porous media through which only the fluid can pass. We can find two different types of filter papers: Quantitative and Qualitative. And for better results, you should learn how to choose the best type for your applications.

The filter paper can remove harmful dust, smoke, poisons, etc. from the gas, and separate the impurity particles from the liquid; it can also block bacteria, microorganisms and the like. It can also be divided into air filter paper and liquid filter paper from the use.

Materials and types

The filter paper is made of one or more of inorganic fiber, plant fiber, and synthetic fiber, adding the appropriate amount of chemical auxiliaries and fillers, and is made by papermaking technology. It is a kind of filter media and s a scientific tool that is porous and has good filtration performance.

Currently, filter paper has been widely used in various fields. However, because of the different types of fibers constituting the filter paper, the performance and use of the filter paper are different.

There are ordinary filter papers for general occasions, glass fiber filter papers for high temperature, and polypropylene filter papers for ultra-clean and so on. Based on the usages, it can be divided into paint filter paper, paint mist filter paper and grinder filter paper. In the lad, there are quantitative analysis filter paper, qualitative analysis filter paper, and chromatographic qualitative analysis filter paper.

Difference In Hawach Quantitative And Qualitative Filter Papers

Three Kinds Of SPE Cartridges

Solid phase extraction, as we called it as SPE, is widely used for the pretreatment when the sample is analyzed. With SPE used for separation, the solution will be generally left behind by gravity or with a vacuum device to speed up the separation, and many of the problems associated with liquid/liquid extraction can be avoided, such as incomplete phase separations, less-than-quantitative recoveries.

The scientists in the lab also can save lots of expensive, breakable specialty glassware, and they don’t need to dispose of large quantities of organic solvents.

SPE is an advance way to prepare liquid samples and extract semivolatile or nonvolatile analytes. The scientists often use it with solids that are pre-extracted into solvents as well. Compared with the liquid/liquid extraction, SPE is more efficient and easy to perform.

Available in a wide variety of chemistry, adsorbents, and sizes, Hawach SPE cartridges are excellent tools for sample extracting, concentrating and cleanup. With the consist of a medical PP empty tube, a medical PE sieve plate, and a fixed adsorbent, you can find Hawach SPE Cartridges in different types of silica gel, polymer, adsorption, and the special cartridge according to matrix type.

SPE is a physical extraction process consisting of a liquid phase and a solid phase. During the extraction process, the adsorption of the solid relative analyte is greater than that of the sample base.

When the sample passes through the solid phase cartridge, the analyte is adsorbed on the surface of the solid filler, and the other sample components pass through the cartridge analyte and can be eluted with a suitable solvent to achieve separation and purification.

Three Kinds Of SPE Cartridges

Attractive Points And Consideration Factors Of Syringe Filter

Syringe filter could be divided into a disposable and multiple-time filtering tool based on its usage frequency. In terms of the different filter membranes used, there are five kinds of syringe filters mainly used for the lab experiments, including Nylon, PVDF, PTFE, CA, Glass Fiber, PP, PES syringe filter. Especially, the PVDF, PTFE, Nylon and PES filter would be specifically introduced as below.

Attractive Points

Hawach syringe filter is a cost-effective way to improve the quality of HPLC analysis, and suitable for a multiple of other applications. Precisely designed structure ensures the fluency of the filtration, improves consistency, extends column life and reduces maintenance. By removing particles before the sample enters the column, Hawach syringe filter allows unimpeded flow.

Besides, reasonable inner space minimizes the hole-up volume, so that the waste is greatly reduced. Housing material is medical grade polypropylene, which gives it better chemical compatibility and excellent chemical stability. Edge is matched with screws which makes operator more convenient to use. Standard female and male lure lock provides better sealing effect and greater strength to the filter housing without leakage and bursting.

Consideration Factors

Hawach Scientific is noted for the most advanced equipment, the strict testing process, and the best service. Hawach research team keeps on investing and testing syringe filters for lab industry and pursuing perfection, and makes endeavor to offer the best syringe filter to customers.

Avoid the introduction of other impurities in the filtration process, especially the shell materials or shed particles from the filter membrane, if it is used to treat chromatographic samples. Different types of syringe filters are suitable for different properties of samples due to different materials.

Attractive Points And Consideration Factors Of Syringe Filter

To Know More About HAWACH Sample Vials Production

HAWACH sample vials are manufactured with precise design, professional technology, and strict technical specifications. We also perform rigorous testing of dimensions such as polishing, OD and length to ensure that each vial is exactly matched to the autosampler jaw and sample system.

Our sample vials are made of bismuth quality borosilicate glass and meet ASTMTYPEI ClassA and USP TYPE I standards. Moreover, its whole production line is under a high standard of quality control.

HAWACH specializes in providing laboratories and industrial testing instruments from basic to specialized whose professional technical support and after-sales service have won a good reputation. Over the years, HAWACH has been committed to serving analytical fields, providing high-quality laboratory consumables, laboratory reagents and laboratory instruments.

Sample vials production

All products are produced under strict cleanliness standards, in accordance with the high hygienic conditions of the pharmaceutical standards, with high-quality raw materials under very mature production conditions.

The HAWACH sample vials are made from a grade 1 hydrolyzed glass material through a 600-degree annealing process. This product is used for long-term storage of aqueous solutions. The photodetector on the glass production equipment then detects whether the bottle produced meets the standard.

To Know More About HAWACH Sample Vials Production

Key Technical Parameters And Highlights Of HAWACH Flash Column

Used to purify organic compounds, the Flash column is a fast and inexpensive technology. It was originally discovered by W.C. Stills of Columbia University in 1978 and was published in the Journal of Organic Chemistry in 1978.

HAWACH products have been widely used in biopharmaceuticals, life sciences, education, government agencies, and health industries, etc. Since its inception, HAWACH has served more than numerous customers and provides OEM and customized services to dozens of well-known brands around the world. Its product lines cover sample preparation, filtration and sample collection and so on. Today’s focus will be on the flash column.

Principle

Flash column utilizes a plastic column filled with some form of solid fill material, typically silica gel, and the separated sample is placed on top of the solid fill material. The column is a gradient solvent, which allows the sample to fill the column and be separated by means of pressure. Flash column initially uses air pressure, but today pumps are used to accelerate separation. This technique is known as low-pressure chromatography and can separate samples from milligrams to tens or hundreds of grams.

This technique is particularly advantageous because it allows for faster flow rates of the solvent, as opposed to simple gravity flow. Special considerations for flash chromatography include the usage of finer particle size for the stationary phase (such as silica gel).

Classification of HAWACH flash column

There are three series of the flash column at HAWACH, namely
StarFlash series: Only silica gel columns included which are divided into standard and advanced grades. The advanced silica gels are of higher purity and better quality.

PureFlash series: Corresponding to silica gel construction and phase column, C18 (spherical inlet and irregular domestic), C4, C8, NH2, CN, HILIC, alumina and so on. All are imported fillers for the high-end market.

Key Technical Parameters And Highlights Of HAWACH Flash Column

The Basics You Should Know About The Capsule Filter

Hawach is a tech-driven company that commits to research and development of innovative lab products to improve experiment conditions and results. It has developed a full product range composed of core materials with unique performance capabilities.

The filter capsule, also known as the integral filter, could ensure there is no contaminant in the sample. The PP filter capsule uses a laminated filter membrane with a large filtration surface area, which is suitable for the filtration of large volume solutions. It has different available bore sizes provided.

Classification
Hawach capsule filter uses different filter media depending on the characteristics of the filter object. The following are the commonly used series:

1. It adopts hydrophobic polytetrafluoroethylene (PTFE) filter membrane, which is suitable for solvent and corrosive solution filtration, air and gas vent filtration.
2. It uses hydrophilic polypropylene (PP) filter membrane, suitable for reverse osmosis and ultrafiltration pre-filter, ink filtration, and also for filtering aqueous and solvent samples.
3. It can be made of nylon membrane, which has the characteristics of a fast flow rate and low level of extractable. Pre-filter media with glass fiber can be used to extend the service life of nylon membranes, suitable for filtration of larger volume samples and difficult-to-filter samples.

Others include lithography capsule filter, ink capsule filter, fuel capsule filter, developer capsule filter, and toothpaste additive capsule filter.

Use Precautions Of Membrane Filter

Hawach membrane filter is one of the most commonly used lab tools in many fields, such as scientific research, food testing, chemical industry, nanotechnology, energy, and environmental protection. During the use, the following aspects need the operators to pay great attention to.

Performance of Nylon Membrane Filter

Hawach Nylon membrane filter is internally designed with an inert, internal polyester support web, which gives it added dimensional strength and stability to prevent cracking, curling and breaking.

This added strength and durability is advantageous compared with traditional types during usage because it involves aggressive handling or automated equipment. As a naturally hydrophilic membrane, Hawach Nylon membrane filter does not require wetting agents that can interfere with biological processes. In addition, its high surface area and high flow rate successfully immobilize antigens, antibodies and other proteins.

Humanization of Membrane Filter

The membrane filter provided by Hawach Scientific is customized to meet customers’ application and size requirements. Sales policy is flexible, and small order is acceptable. All customization is convenient and cost-effective because all products are manufactured on-site in Hawach facilities.
For additional information, for all customers OEM specific applications, Hawach Scientific has the product breadth and flexibility to meet customer’s needs, as well as the quality standards to help ensure customers’ success. Contact Hawach to discuss application requirements and order products.

According to the adsorption mechanism and the porosity character of the membrane and supporting layer, we can explain why the membrane filter cannot be easily blocked with clean water.

On the contrary, the wastewater with oil will lead to blocking. As for common suspended solid, particles that are larger than the membrane pore will be filtered out of the surface of the membrane.

Use Precautions Of Membrane Filter

Diol HPLC Column And C30 HPLC Column

Hawach HPLC column has become one of the most important laboratory tools for separation and purification technology, whose main function is to separate each substance in the sample. HPLC technology has been widely used in the fields of chemistry, medicine, food safety, etc. Generally, there are mainly three types of HPLC columns satisfying customers’ various requirements.

By employing the high-purity silica gel as the matrix, the Diol HPLC column uses unique bonding technology to make itself more stable and durable in aqueous media. The detailed information of the column would be described as follows.

Lutein and vitamin E are common nutrient enhancers in foods. The analytical methods for these two types of substances are clearly defined in the food nutrition enhancer use standards. The separation of isomers is also specifically illustrated. The C30 HPLC column is a specially designed column for the separation of carotenoid isomers.

Features

First of all, the Diol HPLC column has higher selectivity than the normal-phase separated silica gel, since the hydrophilicity of the diol group is weaker than the one of pure silica gel. The polarity of its stationary phase is slightly less than the unbonded silica gel, which provides moderate positive phase retention and excellent selectivity. Besides, its high-performance silica gel and special bonding technology could stabilize the diol bonded phase in the aqueous medium without loss of column service life. Also, it has high inertness and durability.

Diol HPLC Column And C30 HPLC Column

Filtstar Series PES Syringe Filters

Hawach FILTSTAR PES series syringe filters are the hydrophilic and low affinity for proteins and extractable, which results in high throughputs when these small filter devices are used to sterilize or clarify viscous proteinaceous solutions.

Features of PES Syringe Filters

•Hydrophilic Syringe Filter
•Wide pH range (1-14)
•Female Luer-Lock inlet and male Luer slip outlet

Advantages of PES Syringe Filters

•Human hands never touch the filter during assembly
•100% integrity tested, individually packaged, and sterilized
•Manufactured in a controlled environment using an automated process
•Include a Certificate of Quality

Applications of PES Syringe Filters

•Sterilize biological fluids, serum or tissue culture media additives
•Sample preparation of aqueous solutions
•High throughput, low binding filter
•Units for sterile aqueous filtrations
•Filter probe and hybridization solutions to reduce backgrounds
•Sample preparation of protein-based
•HPLC solutions
•High throughputs when sterilizing or clarifying even the most viscous proteinaceous solutions
ICP-MS on metal ion extractable test of PES syringe filter(Filstar series)
Experiment object
To verify Hawach Scientific Co., Ltd PES syringe filter can use in ICP-MS on metal ion test field, and quantitative test the amount of extractable ion.
Experiment process
Hawach Scientific Co., Ltd PES Syringe Filter(25mm 0.22) is filtered by 3ml ultra-pure water, the first 1ml discard, collect the first 2ml filter water and go on tested by ICP-MS of several ion species. Each sample was repeated for 3 times.
Experiment result

on	Bi	Pb	Tl	Hg	Ba	Sb	Sn
Amount	< 0.01 ppb	< 0.2 ppb	< 0.02 ppb	< 0.02 ppb	< 0.1 ppb	< 0.1 ppb	< 0.1 ppb
Ion	Cd	As	Se	Zn	Cu	Ni	Fe
Amount	< 0.05 ppb	< 0.05 ppb	< 0.05 ppb	< 0.1 ppb	< 0.2 ppb	< 0.2 ppb	< 0.5 ppb
Ion	Co	Mn	Cr	Al	Ca	K	Na
Amount	< 0.2 ppb	< 0.2 ppb	< 0.2 ppb	< 0.5 ppb	< 5 ppb	< 5 ppb	< 10 ppb

Technical Data

Filter Media	PES
Diameter	4mm	13mm	25mm	33mm	50mm
Housing	Medical PP	Medical PP	Medical PP	Medical PP	Medical PP
Pore Size	0.1μm, 0.22μm, 0.45μm, 0.65μm, 1.0μm, 3.0μm, 5.0μm
Filtration Area	0.2cm2	1.3cm2	4.9cm2	8.5cm2	19.8cm2
Maximum Pressure	5.2bar	5.2bar	5.2bar	5.2bar	5.2bar
Process Volume	2mL	10mL	100mL	200mL	5000mL
Pre-filter	1um GF or PP	1um GF or PP	1um GF or PP	1um GF or PP	1um GF or PP
Hold-up Volume	< 10μL	< 50μL	< 100μL	< 200μL	< 350μL
Inlet	Female Luer Lock	Female Luer Lock	Female Luer Lock	Female Luer Lock	Stepped barb
Outlet	Male luer slip	Male luer slip	Male luer slip	Male luer slip	Stepped barb
Operate temperature	60℃

Instruction Drawing

Ordering Information

Item Code	Pore Size(μm)	Diameter(mm)	Sterile	Pre-filter	Quantity/pk
SLPES0410N	0.10	4	No	No	100pcs
SLPES0422N	0.22	4	No	No	100pcs
SLPES0445N	0.45	4	No	No	100pcs
SLPES0465N	0.65	4	No	No	100pcs
SLPES04100N	1.0	4	No	No	100pcs
SLPES0410NP	0.10	4	No	PP	100pcs
SLPES0422NP	0.22	4	No	PP	100pcs
SLPES0445NP	0.45	4	No	PP	100pcs
SLPES0465NP	0.65	4	No	PP	100pcs
SLPES04100NP	1.0	4	No	PP	100pcs
SLPES0410NG	0.10	4	No	GF	100pcs
SLPES0422NG	0.22	4	No	GF	100pcs
SLPES0445NG	0.45	4	No	GF	100pcs
SLPES0465NG	0.65	4	No	GF	100pcs
SLPES04100NG	1.0	4	No	GF	100pcs
SLPES1310N	0.10	13	No	No	100pcs
SLPES1322N	0.22	13	No	No	100pcs
SLPES1345N	0.45	13	No	No	100pcs
SLPES1365N	0.65	13	No	No	100pcs
SLPES13100N	1.0	13	No	No	100pcs
SLPES1310NP	0.10	13	No	PP	100pcs
SLPES1322NP	0.22	13	No	PP	100pcs
SLPES1345NP	0.45	13	No	PP	100pcs
SLPES1365NP	0.65	13	No	PP	100pcs
SLPES13100NP	1.0	13	No	PP	100pcs
SLPES1310NG	0.10	13	No	GF	100pcs
SLPES1322NG	0.22	13	No	GF	100pcs
SLPES1345NG	0.45	13	No	GF	100pcs
SLPES1365NG	0.65	13	No	GF	100pcs
SLPES13100NG	1.0	13	No	GF	100pcs
SLPES2510N	0.10	25	No	No	100pcs
SLPES2522N	0.22	25	No	No	100pcs
SLPES2545N	0.45	25	No	No	100pcs
SLPES2565N	0.65	25	No	No	100pcs
SLPES25100N	1.0	25	No	No	100pcs
SLPES2510NP	0.10	25	No	PP	100pcs
SLPES2522NP	0.22	25	No	PP	100pcs
SLPES2545NP	0.45	25	No	PP	100pcs
SLPES2565NP	0.65	25	No	PP	100pcs
SLPES25100NP	1.0	25	No	PP	100pcs
SLPES2510NG	0.10	25	No	GF	100pcs
SLPES2522NG	0.22	25	No	GF	100pcs
SLPES2545NG	0.45	25	No	GF	100pcs
SLPES2565NG	0.65	25	No	GF	100pcs
SLPES25100NG	1.0	25	No	GF	100pcs
SLPES3310N	0.10	33	No	No	50pcs
SLPES3322N	0.22	33	No	No	50pcs
SLPES3345N	0.45	33	No	No	50pcs
SLPES3365N	0.65	33	No	No	50pcs
SLPES33100N	1.0	33	No	No	50pcs
SLPES3310NP	0.10	33	No	PP	50pcs
SLPES3322NP	0.22	33	No	PP	50pcs
SLPES3345NP	0.45	33	No	PP	50pcs
SLPES3365NP	0.65	33	No	PP	50pcs
SLPES33100NP	1.0	33	No	PP	50pcs
SLPES3310NG	0.10	33	No	GF	50pcs
SLPES3322NG	0.22	33	No	GF	50pcs
SLPES3345NG	0.45	33	No	GF	50pcs
SLPES3365NG	0.65	33	No	GF	50pcs
SLPES33100NG	1.0	33	No	GF	50pcs
SLPES5010N	0.10	50	No	No	25pcs
SLPES5022N	0.22	50	No	No	25pcs
SLPES5045N	0.45	50	No	No	25pcs
SLPES5065N	0.65	50	No	No	25pcs
SLPES50100N	1.0	50	No	No	25pcs
SLPES5010NP	0.10	50	No	PP	25pcs
SLPES5022NP	0.22	50	No	PP	25pcs
SLPES5045NP	0.45	50	No	PP	25pcs
SLPES5065NP	0.65	50	No	PP	25pcs
SLPES50100NP	1.0	50	No	PP	25pcs
SLPES5010NG	0.10	50	No	GF	25pcs
SLPES5022NG	0.22	50	No	GF	25pcs
SLPES5045NG	0.45	50	No	GF	25pcs
SLPES5065NG	0.65	50	No	GF	25pcs
SLPES50100NG	1.0	50	No	GF	25pcs