<P> Grade 602 h qualitative filter paper has the pore size of 2 μm . This grade of filter paper has the smallest pore size among all standard qualitative filter papers . It is used for collecting or removing fine particles . </P> <P> Quantitative filter paper, also called ash - free filter paper, is used for quantitative and gravimetric analysis . During the manufacturing, producer use acid to make the paper ash-less and achieve high purity . </P> <P> Chromatography is a method chemists use to separate compounds . This type of filter paper has specific water flow rate and absorption speed to maximize the result of paper chromatography . The absorption speed of this type of filter paper is from 6 cm to 18 cm and the thickness is from 0.17 mm from 0.93 mm . </P> <P> Extraction thimbles are rod - shape filter paper often used in Soxhlet extractors or atomized extractors . It is ideal for very sensitive detection, the performance it depends on the thickness of inner diameter . Also, it is usually used in areas of food control and environmental monitoring . </P>

Types of filter paper used in paper chromatography
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