Hawach Filter Papers Material

Proper selection of a properly functional filter medium or filter not only ensures the integrity of the sample preparation process, but also facilitates accurate and reliable experimental results, and is more conducive to accelerating the development process, creating benefits and saving costs.

Ash content

The residual ash content of the filter media (such as cotton cellulose qualitative filter paper) after burning at 900 ° C in air. “Ashes” is essential for gravimetric experiments. The smaller the ash content of the filter media, the lower the impurity background, which also contributes to the cleanliness of conventional samples. The essential difference between qualitative filter paper and quantitative filter paper (including ashless filter paper) is the size of the ash value.

Hawach cotton fiber filter paper

Hawach’s qualitative and quantitative filter papers (including ashless filter paper) are made from high-quality cotton cellulose. These cotton fibers are specially treated to ensure that the α-cellulose content is above 98%. The cellulose filter paper is suitable for conventional filtration, particle retention up to 30um, minimum to 2μm, divided into multiple flow rate levels, and a variety of cut-off particle size/flow rate combinations to meet laboratory application needs.

Hawach ashless quantitative filter papers has an unparalleled high purity and is suitable for chemical analysis and specific gravity. This type of filter paper has the smallest metal background. Other cellulose such as lignocellulose, sheepskin fiber, and other metal backgrounds will be slightly higher, and some varieties add wet strength agents in order to increase the strength of the filter paper.

Therefore, when choosing any kind of filter media (not only cellulose filter media), we must not only choose the “chemical compatibility table of the media and the outer casing”, but also must consider the material of the filter media, the purity of the material. How, because it affects the integrity of the physicochemical information of the sample you are analyzing.