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Picture of Grade 40 Ashless Filter Paper 125 mm circle (100 pcs) 1440-125

Grade 40 Ashless Filter Paper 125 mm circle (100 pcs) 1440-125

GR 40 12.5CM 100/PK
SKU: 1440-125
Manufacturer: Cytiva
Pack Size: 100

 

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
Applications for high-purity Grade 40 filters
High-purity filters support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples. Cytiva's high-purity Whatman Grade 40 ashless paper is suited to:
  • Soil analysis, when separating solid matter from aqueous extracts
  • Quantitative determination of milk sediment
  • Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometry
  • Analysis of constituent components in cements, clays, iron, and steel products
  • Collection of trace elements and radionuclides from the atmosphere
 

Product specifications

Grade 40 Ashless Filter Paper for Pollution Analysis, 125 mm circle (100 pcs)

GradeGrade 40 
FormatCircles 
TypeAshless 
Typical Particle Retention in Liquid8 µm 
Nominal thickness210 µm
Typical water flow rate at 45 psi (3.1 bar)25 ml/min 
Nominal basis weight95 g/m²
Nominal air flow rate21 s/100 mL/in² 
Nominal Ash Content0.007% 
MaterialHigh-quality cotton linters 
Alpha Cellulose Content Min.≥98% 
Typical Trace Element LevelsAluminium 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 
ApplicationDesigned 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. 
 
Attribute nameAttribute value
Pack Size100
GradeGrade 40
Diameter125mm

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