Hardened Quantitative Filter Paper - 0550-0900 - Grade 55, 9cm 54 Grade 75 is often used

Grade 75 is often used for filtering trace elements

Ahlstrom-Munksjö 94

particle testing

collecting hydroxides after precipitation by strong alkalis and in the analysis of metals in acid and alkali solutions

which is then acid-washed using IN HNO3

Hardened Quantitative Filter Paper - 0550-0900 - Grade 55, 9cm 54 Grade 75 is often usedAhlstrom Munksj 55 15 m, Fast Speed This is a fast filtering grade for gravimetric analysis of coarse particles and gelatinous precipitates (i. e.: aluminum and zirconium hydroxides) in acid and alkali solutions. Grade 55 is also used in air and foodstuffs analysis and for chloride and phosphorous in cement, coal and coke.