Filter Papers, Grade 42, 1442-125 Quantitative Round Sheets Pack of 100 Chemistry Lab & Industrial Experiments for Schools or Laboratory Activities 1126

Product description

General description Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs. Ashless: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures. Hardened low ash: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates. Hardened ashless: 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures. Grade 42: 2.5 μm (slow filter paper) A world standard for critical gravimetric analysis with the finest particle retention of all Whatman cellulose filter papers. Typical analytical precipitates include barium sulfate, metastannic acid, and finely precipitated calcum carbonate. Other Notes Field of Use : For internal research use only. 

Whatman filter paper is a type of paper that is specifically designed for use in scientific and industrial applications, including the food, pharmaceutical, and chemical industries. It is often used for filtration, as it is able to remove particles from liquids and gases. Whatman filter paper is available in a variety of different grades and types, each of which is suitable for different applications.