Whatman 42 Filter Paper

…particle retention of all Whatman cellulose filter papers from GE Healthcare. Ashless: 0.007% ash maximum for Grades 40 to 44. These are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman quantitative filters from GE Healthcare are…

…a calcium carbonate filterGE’s Whatman Grade 42 quantitative papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis. Whatman quantitative papers come in a variety of particle…

…of Grade 42 that retains very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42. Ashless: 0.007% ash maximum for Grades 40 to 44. These are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman…

…analysis can be time-consuming when filtration of fine particles is required. Because of its reduced thickness, Grade 44 ashless filter paper from GE provides faster filtration of fine particles when compared with thicker papers of similar retention rating, such as Whatman Grade 42 paper.