Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 12.5 cm, Cytiva, 1442-125

Cytiva® Whatman® Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 12.5 cm, 1442-125

Features:

• High-purity ashless Grade 42 quantitative filter papers are suitable for wide range of critical analytical filtration procedures for quantitative analysis
• Have finest retention of all Whatman ashless filter paper grades
• Designed for gravimetric analysis and sample preparation for instrumental analysis
• Ashless: 0.007% ash maximum
• Fine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
• Herzberg filtration speed of 1870 s
• Commonly used as calcium carbonate filter in cement industry
• Particularly suitable for gravimetric analysis of precipitates including barium sulfate and metastannic acid for use in glazes, coatings, and pigments
• Suitable of processes that require ashing
• Nominal thickness: 200 µm
• Nominal basis weight: 100 g/m²
• Minimum alpha cellulose content: ≥98%
• Trace element levels: Aluminium 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