Description
Cytivas Whatman Grade 40 high-purity filters are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
• High-purity filters contain 0.007% maximum ash content
• Medium nominal particle retention rating of 8 µm
• Medium filtration speed (Herzberg 340 s)
• Particularly useful for gravimetric analysis
Specifications:
• Grade: Grade 40
• Type: Ashless
• Typical Particle Retention in Liquid†: 8 µm
• Nominal thickness: 210 µm
• Typical water flow rate††: 25 ml/min
• Nominal basis weight: 95 g/m
• Nominal air flow rate: 21 s/100 mL/in
• Nominal Ash Content†††: 0.007%
• Material: High-quality cotton linters
• Alpha Cellulose Content Min.: 98%
• Typical Trace Element Levels: Aluminum 2.5 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 8.3 µg/g Chromium 1.5 µg/g Copper 2 µg/g Iron 12 µg/g Lead <0.5 µg/g Magnesium 4 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 2.3 µg/g Silicon 6.2 µg/g Sodium 16.8 µg/g Zinc 64.5 µg/g
• Application: Designed for gravimetric analysis and the preparation of samples for instrumental analysis. Gravimetric analysis for numerous components in cements, clays, iron, and steel products. As a primary filter for separating solid matter from aqueous extracts in general soil analysis. Quantitative determination of sediments in milk and as a pure analytical grade clean-up filter for solutions prior to AA spectrometry. Also used as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere.
†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.