Ashless filter papers are particularly suited for quantitative routine analysis and are manufactured from refined pulp and linters. They are acid-washed and have an extremely low ash content of 0.01%. The amount of a-cellulose is about 95%.
Accordingly, why do you use filter paper in TLC?
Paper Placement, Air Impregnation. You place your filter paper in the sealed development chamber after the solvent but before the stationary phase. It absorbs the liquid in the solvent and provides more surface area for evaporation. More evaporation means more solvent vapor in the chamber's air, which is desirable.
What is Whatman filter paper #42?
Ashless paper for gravimetric and instrumental analysis. Whatman Grade 42 quantitative papers from GE Healthcare's Life Sciences business are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.
What is a filter paper made of?
Filter paper is a quantitative paper used for filtering and made of pure cellulose treated with hydrochloric and hydrofluoric acid. This kind of paper burns out practically without any remains (less than 0.0001 g ashes).