24.0cm Grade 1 qualitative cellulose filter paper is the most widely used filter paper for routine applications with medium retention (11µm) and flow rate. Traditionally, this grade is used for qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot) and calcium carbonate. Used for soil analysis and seed testing procedures in agriculture. It is also used for numerous routine techniques in the food industry to separate solid foodstuffs from the associated liquid or extracting liquid; It is widely used in teaching and teaching simple qualitative analytical distinctions in education. In air pollution monitoring, using circles or rollers, atmospheric dust is collected from the air stream and the stain density is measured photometrically. For gas detection, The paper is impregnated with a chromogenic reagent and the color formation is quantified by optical reflection. Hold: 11um. Diameter:125mm. 100