Laboratory Filter Paper
Filter papers produced by Hawach laboratory filter paper manufacturer are divided into two series, qualitative filter paper, and quantitative filter paper.
Laboratory Filter Paper Manufacturer
Qualitative filter papers are divided into standard grades and wet-strengthened grades. Wet strengthened grades are added a small amount of chemical stabilizer on the basis of the standard grades. Quantitative filter paper is generally aimed at ashless filter paper. It must undergo special treatment procedures during use. To a certain extent, it can effectively resist certain chemical reactions, so impurities generated on its surface will be much less, under normal circumstances it is generally used in quantitative analysis. Qualitative filter paper ash content is less than 0.1%, and quantitative filter paper ash content is less than 0.007%. Ash content is the biggest difference between qualitative filter paper chemistry lab and quantitative filter paper. As filter paper manufacturers, Hawach has disc and sheet types, regular or customized sizes, and shape available.
Grade comparison provided by laboratory filter paper manufacturer
Qualitative Filter Paper
|Whatman||Grade 1||Grade 2||Grade 4||Grade 5||Grade 6|
Wet Strengthened Grades
|Whatman||Grade 91||Grade 113|
Quantitative Filter Paper
|Whatman||Grade 40||Grade 41||Grade 42||Grade 43||Grade 44|