Whatman Quantitative Filter Paper, Ashless, Grade 42, 24 cm 1442-240 (Package of 100 Circles)

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Whatman Quantitative Filter Paper, Ashless, Grade Features

• Quantitative filter paper for gravimetric and instrumental analysis

• Commonly used as a calcium carbonate filter for analysis in the cement industry

• Also used for barium sulfate and metastannic acid for use in glazes, coatings, and pigments

• Fine particle retention rating eliminates large particles that interfere with sensitive instrumentation

• Herzberg filtration speed of 1870 s

About Whatman Quantitative Filter Paper, Ashless, Grade

Whatman Quantitative Filter Paper, Ashless, Grade 42, 24 cm 1442-240 (Package of 100 circles). 2.5 µm particle retention in liquid; 5 ml/min typical water flow rate for 9 cm diameter; 200 µm nominal thickness; 100 g/m2 nominal basis weight; 96 s/100 mL/in2 nominal air flow rate; 0.007% nominal ash content, greater than/equal to 98% alpha cellulose content minimum.