Whatman® Grade 4 Filter Paper

For rapid filtering with excellent retention of coarse particles and gelatinous precipitates. Good rapid filter for routine cleanup of biological fluids or organic extracts during analysis. Also for air pollution monitoring where high flow rates are required. Porosity: Coarse Flow Rate: Fast Particle Retention: 20-25 um  

Starting at $12.36

For rapid filtering with excellent retention of coarse particles and gelatinous precipitates. Good rapid filter for routine cleanup of biological fluids or organic extracts during analysis. Also for air pollution monitoring where high flow rates are required. Porosity: Coarse Flow Rate: Fast Particle Retention: 20-25 um  

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