Whatman hardened ashless quantitative filter papers are acid-hardened to give high wet strength and chemical resistance with extremely low ash content. They are suitable for a wide range of critical filtration procedures.
Large nominal particle retention for fast analytical filtration.
High chemical resistance to strong acid and alkali suspensions
Retention of gelatinous precipitate
22 µm nominal particle retention rating
Fast flow rate (Herzberg filtration speed 34 s)
Maximum of 0.006% ash concentration
Quantitative determination of milk sediment
Use as an animal foodstuff filter for determining fiber content
Determination of gelatin content in milk and cream
Quantification of chloride in cement, as well as chloride and phosphorous in coal and coke
>20 to 25μmm
Tough, smooth surface. Coarse gelatinous precipitates. Useful for intermediate stages of gravimetric analysis
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