Description ofĀ Whatman Filter Papers N0. 1
Whatman Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.
- Qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate
- Agricultural soil analysis and seed testing procedures
- Industrial food processing techniques to extract liquid or separate solid foodstuffs from associated liquid
- Air pollution monitoring by collecting atmospheric dust from airflow and photometrically measuring the stain-intensity
- Gas detection by quantitative chromogenesis with optical reflectance
Description ofĀ Whatman Filter Papers 40:
Whatman Filter Papers 40 high-purity filtersĀ 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 Āµm
- Medium filtration speed (Herzberg 340 s)
- Particularly useful for gravimetric analysis
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
Description ofĀ Whatman Filter Papers 41:
Cytiva’s Whatman Grade 41 environmental pollution papers are among the fastest filter papers in the Whatman ashless range. This gravimetric filter is well suited for quantitative analysis of soil and air.
- Extremely low ash content (0.007% ash maximum)
- 20 Āµm nominal particle retention rating
- Fast filtration speed (Herzberg 54 s)
- Commonly used for routine air pollution analysis and soil pollution analysis
Our high-purity Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.
- Ashless: 0.007% ash maximum
- Fine (2.5 Ī¼m) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
- Herzberg filtration speed of 1870 s
- Commonly used as a calcium carbonate filter
- Particularly suitable for gravimetric analysis
Description ofĀ Whatman Filter Papers 42:
Whatman Grade 42 quantitative papersĀ are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.
Specification of No.1
Diameter:Ā 110Ā mm
Grade: Grade 1Ā
Grade:Ā Type Standard
Material:Ā CelluloseĀ
Specification ofĀ No.40,41,42
Grade:Ā 40,41,42
Format: Circles
Type: Ashless
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