Starlab Scientific Co., Ltd Filter Paper
Starlab Scientific Co., Ltd filter papers are all made of pure cotton linters and have an ash content of less than 0.006%, the high alpha cellulose is produced under tightly controlled manufacturing conditions to assure lot to lot quality year after year, the quality is equivalent to Whatman and the price is very competitive.
Starlab Scientific Co., Ltd filter papers in general speaking, we have qualitative filter paper and quantitative filter paper.
Qualitative filter paper, after filtering, would generate more cotton fiber, So it is only suitable for qualitative analysis; quantitative filter paper, especially gray-free filter paper, through a special treatment procedure, can be more effective resistance to chemical reactions, Fewer impurities, can be used for quantitative analysis.
The Technical Parameters of filter paper
A. Pore size: Filter paper is different from the membrane filter, there is no precise pore size. Only approximate values.
B.Flow rate: The flow rate is mainly affected by the pore size, the larger the pore size, the faster the flow rate. The flow rate we currently have are fast speed, medium speed and slow speed.
C.Ash content: It means the remaining ash content that after the filter media had been burned at 900 degrees in the air. The ash is critical to gravimetric methods. The smaller the ash content of the filter media, the lower the impurity, and also helps determine the cleanliness of conventional samples. The ash of qualitative filter paper is less than 0.1%, and the ash of quantitative filter paper is less than 0.007%.
D.The Weight of per gram: The weight of the product of per square meter. The qualitative filter paper is about 84g. The quantitative filter paper is about 101g.
E.The power of resistant to break: It means the ability that the filter paper can withstand the maximum vertical pressure in the unit area.
F.Size: Circle filter paper: 70,90,110,125,150,180. Square filter paper: 60*60,41*45 etc., other types and size we also accept.