Whatman Grade 541 Quantitative Hardened Ashless Filter Papers

Whatman Grade 541 Quantitative Hardened Ashless Filter Papers feature high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration. Hardened ashless filter paper is recommended when fast filtration of a gelatinous precipitate for gravimetric analysis is performed on a strongly acidic or alkali solution. Applications of Grade 541 papers include use as an animal foodstuff filter for determining fiber content, determination of gelatin content in milk and cream, and quantification of chloride in cement, as well as chloride and phosphorous in coal and coke.

• High wet-strength
• High chemical resistance to strong acid and alkali suspensionsRetention of gelatinous precipitate
• 22 µm nominal particle retention rating
• Fast flow rate (Herzberg filtration speed 34 s)
• Maximum of 0.006% ash concentration