Feature

●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


Description

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.