Description
Cytivas Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples.
• Acid-treated for high wet-strength
• Extremely low ash content (0.006% ash maximum)
• Nominal particle retention of 8 µm
• Medium flow rate (Herzberg filtration speed 200 s)
• High chemical resistance to strong acid and alkali suspensions
Specifications:
• Grade: Grade 540
• Type: Hardened Ashless
• Typical Particle Retention in Liquid†: 8 µm
• Nominal thickness: 160 µm
• Typical water flow rate††: 97 ml/min
• Nominal basis weight: 85 g/m
• Nominal air flow rate: 13 s/100 mL/in
• Nominal Ash Content†††: 0.005%
• Material: High-quality cotton linters
• Alpha Cellulose Content Min.: 98%
• Typical Trace Element Levels: Aluminum 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: Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis.
†Particle retention rating at 98% efficiency.
††For 9 cm diameter
†††Ash is determined by ignition of the cellulose filter at 900°C in air.
††††U.S. Sales Only
Image(s) are representative of the product group and not necessarily the individual product.