Grade 541 Ashless Fast Filter Paper

GE’s Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration.

• High wet-strength
• 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

Gelatinous precipitate retention

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
• Quantification of chloride in cement, as well as chloride and phosphorous in coal and coke

Grade 541: 22 µm

Specifications:

• Grade: Grade 541
• Format: Circles/Sheet
• Type: Hardened Ashless
• Typical Particle Retention in Liquid: 22 µm
• Typical Water Flow Rate (ml/min) for 9cm diameter: 359
• Nominal Thickness: 155 µm
• Nominal Basis Weight: 78 g/m²
• Nominal Air Flow Rate: 3s/100mL/in²
• Nominal Ash Content: 0.005%
• Material: High-quality cotton linters
• Alpha Cellulose Content Min.: ≥98%
• Typical Trace Element Levels: Aluminium 3.4 µg/g, Antimony <0.5 µg/g, Arsenic <0.5 µg/g, Barium <0.5 µg/g, Boron <1 µg/g, Calcium 14.7 µg/g, Chromium 1.1 µg/g, Copper 8.2 µg/g, Iron 16.3 µg/g, Lead <0.5 µg/g, Magnesium 3.3 µg/g, Manganese <0.5 µg/g, Mercury <0.5 µg/g, Potassium 3.7 µg/g, Silicon <6 µg/g, Sodium 17 µg/g, Zinc 87.8 µg/g

Ordering Information: