2019年9月2日星期一

Information Of Stainless Steel Filter Cartridge

Hawach stainless steel filter cartridge is made of multi-layer stainless steel sintered mesh with a filtration precision of 0.5-200μm. The special size specifications are also can be provided according to user requirements. Here is some more information below.
Features
The stainless steel filter cartridge has good filter performance, especially its uniform surface filtration performance for 2-200μm filter size. What’s more, it possesses good resistance to corrosion, heat, pressure. To be specific, its maximum operating temperature could be up to 450℃ and the operating pressure is ranged from 0.5 to 15Mpa.
The pores of the filter cartridge are quite uniform, which could ensure an accurate filtration and high flow rate during the experiments. Besides, it can be reused after cleaning with no replacement.
Applications
The stainless steel filter cartridge is perfectly suitable for the filtration of strong acid and high viscosity samples in the petrochemical industry. It also could be used for the engineering machinery equipment fuel filtration as well as the oilfield pipeline industry. In particular, it can be used in the pre-water removal of heavy oil combustion systems. Moreover, it is available in the pharmaceutical and beverage industry.
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2019年9月1日星期日

A General Description Of Extraction Thimbles

HAWACH cellulose and glass fiber extraction thimbles are widely used in Soxhlet extractors and are a safe, convenient and efficient method for the extraction of solid and semi-solid materials. Soxhlet extraction is more useful for solutions that are flammable, toxic or odor-prone.
The cellulose extraction thimble is made of high quality cellulose lint with high purity, high mechanical strength, and strong retention. The standard casing wall thickness is approximately 1 mm (particle retention is 10 μm). The thickened casing wall thickness is approximately 2 mm for high retention and increased wet strength, dry strength or special requirements (particle retention of 6 μm). The maximum operating humidity is 120 degrees.
High-purity fiberglass extraction thimbles are made from 100% pure borosilicate glass fiber for special requirements. Glass fiber thimbles are free of adhesives or additives and can, therefore, be used at temperatures up to 500 degrees or for solvents that are not suitable for cellulose extraction thimble. These thimbles are also used for contamination monitoring techniques (conventional particle retention is 0.8μm)
Features
Available in a variety of wall thicknesses for a variety of applications
Designed to work with most Soxhlet extractors
Application
Chimney gas monitoring
Soxhlet extraction
Analysis of pesticide residues

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Manual Bottle-Top Dispenser

A manual bottle-top dispenser is a practical tool for fast, reliable and safe equating reagent. The built-in safety function can protect the user from the accidental overflow of liquid and ensure the smooth operation of the dispenser.
It is widely used in biological, pharmaceutical, clinical, chemical and forensic laboratories. Not only can be used with a variety of liquid reagents but also has excellent sealing performance at different temperatures and viscosities.There are 4 different capacity ranges: 0.5 – 5 ml, 1 – 10 ml, 2.5 – 25 ml and 5 – 50 ml.
Main features :
1. Easy to use volume adjustment
2. smooth piston design provides effortless dispensing
3. closure cap protects, against reagent contact and is easy to attach and removes, without taking gloves off
4. adapters allow fitting to standards reagent bottles
5. filling tube adjusts easily for different size bottles
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Variety And Applications Of Filter Cartridge

Variety of Filter Cartridge
Filter cartridge sold by Hawach Scientific is of diverse types, such as membrane pleated filter cartridge, metal filter cartridge, microfiber pleated filter cartridge and other kinds of filter cartridges.
All of them are tested with good performance and provided with fire and high-temperature proof design, self-cleaning function, washable cylinder, utilization of high strength polyester material and long functional life. But each type also owns its distinct features, customers can order according to specific purposes and unique requirement.
Applications of Filter Cartridge
In order to provide better service for clients, there are some product details about applications.
Generally speaking, micro fiber pleated filter cartridge is widely used, from generation filtration to ultrafiltration; membrane pleated filter cartridge has a wide range of applications in the pharmaceutical, food, biological, beverage and high purity water preparation industries.
The metal filter cartridge includes stainless steel filter cartridge and titanium alloy filter cartridge, which provides good corrosion, high temperature, and high-pressure resistance, it is suitable for operating under strong acid and alkali condition.
Besides, there are other kinds of the filter cartridge with specific applications, such as water purification, oil filed and swimming pool water treatment. For more details, please contact us.
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About The Structure And Working Principle Of HPLC Columns

Structure
High-performance liquid chromatography (HPLC) column consists of a tube, pressure cap, seal ring, filter, joint, screw, and the like. The column tube is made of stainless steel and hick-walled glass or quartz tube can also be used when the pressure is no more than 70 kg/cm2. The inner wall of the tube requires a high degree of finish.
The column joints at both ends are equipped with sieve plates, which are sintered stainless steel or titanium alloy with a pore size of 0.2~20µm (5~10 µm) which depends on the particle size of the filler.
Working principle
HPLC column uses a high-pressure infusion pump to pump the mobile phase, such as a single solvent with different polarities, a mixed solvent of different proportions or buffer solution into a column packed with a stationary phase.
Then inject the sample to be tested through the injection valve, which is taken into the column by the mobile phase. The components in the column are separated into the detector, and the chromatographic signal is recorded by a recorder, an integrator or a chromatographic workstation.
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Performance And Advantages Of SPE Cartridge

Performance of SPE Cartridge
SPE Cartridge supplied by Hawach Scientific is an ideal device for extracting a very broad range of compounds from aqueous samples at a reasonable price you desire. And it has got improved retention for most nonpolar compounds and organic analyzes in aqueous matrices. In application, it has maximized capacity, adsorption and SPE speed.
Advanced technology and innovative design make it deliver clean, highly reproducible sample extracts with lower elution volumes, that is good for greater sensitivity, reliability, and cost-saving. All the raw materials are screened strictly which has directly ensured constant batch-to-batch quality.
Advantages of SPE Cartridge
Compared with traditional SPE Cartridge products, this product provides higher reproducibility, cleaner, and consistent extract. Its application to the preparation of SPE samples can greatly improve the robustness and reliability of various biological, pharmaceutical and environmental applications.
Additionally, this product provides with standard carbon content, average pore size, and excellent flow rate. SPE sample preparation technology has greatly improved the robustness and reliability of various applications such as biological and pharmaceutical fields. It is also significant for customers to simplify the phase selection process and obtain better service.
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Comparison Of Quantitative Filter Paper And Qualitative Filter Paper

Similarity
Both the quantitative filter paper and the qualitative filter paper are cellulose filter papers and are not suitable for other types of filter paper such as glass microfiber filter paper.
Differences
Qualitative filter paper is used for qualitative chemical analysis and corresponding filtration separation; quantitative filter paper is used for gravimetric analysis test and corresponding analytical test in quantitative chemical analysis.
The function of the quantitative filter paper is mainly used for the ashing weighing analysis experiment after filtration. The ash weight of each filter paper after ashing is a fixed value.
The qualitative filter paper is used for general qualitative analysis and for filtration of precipitates and suspensions in solution. While the amount of ash generated after ashing differs the quantitative and qualitative filter paper. The qualitative filter paper does not exceed 0.13%, and the quantitative filter paper does not exceed 0.0009%.
Ashless filter paper is a quantitative filter paper with an ash content of less than 0.1 mg, which is negligible on the analytical balance. Because the qualitative filter paper’s pulp is treated with hydrochloric acid and hydrofluoric acid and washed with distilled water to remove most of the impurities in the paper fibers.
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