Filter Paper - Grade 42 - Quantitative - 2.5um - 185mm (100pk)

Grade 42 circles, ashless (0.007% ash), 42.5 mm.

• Ashless: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades. These are very pure filters suitable for a wide range of critical analytical filtration procedures.

quantitative filters from Cytiva Whatman are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet specific needs.

Grade 42: 2.5 µm

A world standard for critical gravimetric analysis with the finest particle retention of all cellulose filter papers from Cytiva Whatman. Typical analytical precipitates include barium sulfate, metastannic acid, and finely precipitated calcium carbonate.