Types, Classes, and Property of Filter Paper

Types and Classes of Filter Paper

Hawach Scientific supplied two types of filter paper for use in chemical analysis, which can be used for high-efficiency general-purpose laboratory filtration, including water pollution monitoring, air pollution monitoring, and so on.

The two types are named qualitative filter paper and quantitative filter paper. The difference is the amount of ash after ashing. The qualitative filter paper ash is less than 0.15%. The quantitative filter paper ash is less than 0.01%. The filter paper whether qualitative or quantitative can be divided into three types: fast speed, medium speed, and slow speed. The difference lies in the nature of the precipitation property of the separated material. Fast filter paper is suitable for colloidal precipitation and slow filter paper for crystal precipitation. Although both of them can meet the needs of different levels of chemical resistance, loading capacity, interception ability, and particle retention, differences also exist in practical application. The qualitative analysis of the filter paper is often used for qualitative chemical analysis and the corresponding filtration and separation.

The quantitative filter paper is used for the graying weighting analysis experiment after filtration. The most obvious difference between them is the ash weight of each filter paper. Such as Quantitative Ashless Filter Paper Grade: BIO-41, Quantitative Laboratory Filter Paper Grade: BIO-42, Quantitative Cellulose Filter Paper Grade: BIO-44.

Medium Flow Filter Papers
China filter papers supplier
Cellulose Filter Papers

Property of Qualitative Filter Paper

Qualitative filter paper provided by Hawach Scientific generally can be used for general qualitative analysis and for filtration precipitation or suspension in solution, but cannot be used for quality analysis. However, compared with traditional qualitative filters, it gives an improved flow rate, high wet strength, and increased loading capacity. Such as Qualitative Filter Paper Disc Grade: BIO-1, Qualitative Laboratory Filtration Filter Paper Grade: BIO-2, Qualitative 20 Micron Filter Paper Grade: BIO-4, Qualitative Chromatography Filter Paper Grade: BIO-5.

There are three factors needing to consider in filter paper selection:

1. Effective area: the larger the effective area, the larger the dust holding capacity, the smaller the resistance, and the longer the service life. And of course, the cost is correspondingly increased.

2. Fiber diameter: The finer the fiber diameter, the better the interception effect and the higher the filtration efficiency.

3. The content of the binder in the filter material: The high content of the binder means the high tensile strength of the paper and high filtration efficiency. The phenomenon of hair loss rarely appears, with small dust, but the resistance increases accordingly.