Whatman Quantitative Fast Filter Papers, Hardened Ashless, Grade 541, 240 mm circles (100 pcs)

SKU:
GBS 1541-240

    • Description

    Whatman Quantitative Filter Papers, Hardened Ashless, Grade 541

    Whatman is a registered trademark of Cytiva.

    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

    Along with fast Grade 541 filter paper, the hardened, ashless range includes general-purpose Grade 540 and Grade 542 for fine particle retention. All three paper grades are appropriate for use in gravimetric analysis with strong acids and alkali samples.

    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
    ParameterGrade 541 Ashless Fast Filter Paper, 240 mm circles (100 pcs)
    Grade Grade 541 
    Format Circles 
    Type Hardened Ashless 
    Typical Particle Retention in Liquid1 22µm 
    Nominal Thickness 155 µm
    Typical water flow rate2 359 ml/min 
    Nominal Basis Weight 78 g/m²
    Nominal Air Flow Rate 3 s/100 mL/in² 
    Nominal Ash Content3 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 
    Application Typical applications include fiber in animal foodstuffs, gelatine in milk and cream, chloride in cement, and chloride and phosphorous in coal and coke. 
    • 1Particle retention rating at 98% efficiency.
    • 2For 9 cm diameter
    • 3Ash is determined by ignition of the cellulose filter at 900°C in air.