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Whatman 1442-055 Quantitative Filter Paper Circles, 2.5 Micron, Grade 42, 55mm Diameter (Pack of 100)

  • Diameter: 5.5cm
  • Retention: 2.5µm
  • A world standard for critical gravimetric analysis
  • A Whatman cellulose filter is manufactured from high quality cotton linters treated to achieve a minimum alpha cellulose content of 98%
  • Typical analytical precipitates include barium sulphate, metastannic acid and finely precipitated calcium carbonate
Whatman 1442-055 Quantitative Filter Paper Circles, 2.5 Micron, Grade 42, 55mm Diameter (Pack of 100)

Whatman 10311804 Quantitative Filter Paper Circles, 4-7 Micron, Grade 597, 45mm Diameter (Pack of 100)

  • Diameter: 45mm
  • Filtration speed: 140 herzberg; typical thickness: 180µm; basis weight: 85g/m²
  • Retention: 4 - 7µm
  • Medium fast filter paper with medium to fine particle retention
  • Used for a wide variety of analytical routine applications in different industries like food testing (e.g. determination of fat content acc. to § 35 LMBG) or removal of carbon dioxide and turbidity from beverages (e.g. beer analysis acc. to EBC or MEBAK)
Whatman 10311804 Quantitative Filter Paper Circles, 4-7 Micron, Grade 597, 45mm Diameter (Pack of 100)

Whatman 1450-090 Quantitative Filter Paper Circles, 2.7 Micron, Grade 50, 90mm Diameter (Pack of 100)

  • Diameter: 9.0cm
  • Retention: 2.7µm
  • Retention of finest crystalline precipitates, thinnest of all Whatman filter papers and slow flow rate
  • Hardened and highly glazed surface, this finish also keeps the paper free from loose surface fibers
  • Will withstand wet handling and precipitate removal by scraping
Whatman 1450-090 Quantitative Filter Paper Circles, 2.7 Micron, Grade 50, 90mm Diameter (Pack of 100)

Whatman 1440-090 Ashless Quantitative Filter Paper, 9.0cm Diameter, 8 Micron, Grade 40 (Pack of 100)

  • Diameter: 9.0cm
  • Retention: 8µm
  • Classic general purpose ashless filter paper; medium speed and retention; typical applications include gravimetric analysis for numerous components in cements, clays, iron and steel products
  • Primary filter for separating solid matter from aqueous extracts in general soil analysis and quantitative determination of sediments in milk
  • Use as apure analytical grade clean-up filter for solutions prior to AA spectrophotometry; high purity filter in collecting trace elements and radionuclides from the atmosphere
Whatman 1440-090 Ashless Quantitative Filter Paper, 9.0cm Diameter, 8 Micron, Grade 40 (Pack of 100)

Whatman 1440-110 Quantitative Filter Paper Circles, 8 Micron, Grade 40, 110mm Diameter (Pack of 100)

  • Diameter: 11.0cm
  • Retention: 8µm
  • Classic general purpose ashless filter paper; medium speed and retention; typical applications include gravimetric analysis for numerous components in cements, clays, iron and steel products
  • Primary filter for separating solid matter from aqueous extracts in general soil analysis and quantitative determination of sediments in milk
  • Use as apure analytical grade clean-up filter for solutions prior to AA spectrophotometry; high purity filter in collecting trace elements and radionuclides from the atmosphere
Whatman 1440-110 Quantitative Filter Paper Circles, 8 Micron, Grade 40, 110mm Diameter (Pack of 100)

Whatman 1003-090 Quantitative Filter Paper Circles, 6 Micron, 26 s/100mL/sq inch Flow Rate, Grade 3, 90mm Diameter (Pack of 100)

  • 9.0cm
  • Grade 3
  • Used in qualitative analytical techniques to determine and identify materials
  • Double the thickness of Grade 1; even finer particle retention and excellent loading capacity
  • Extra thickness gives increased wet strength; makes this grade highly suitable for use in Büchner funnels
Whatman 1003-090 Quantitative Filter Paper Circles, 6 Micron, 26 s/100mL/sq inch Flow Rate, Grade 3, 90mm Diameter (Pack of 100)

Whatman 1442-047 Ashless Quantitative Filter Paper, 4.7cm Diameter, 2.5 Micron, Grade 42 (Pack of 100)

  • Diameter: 47mm
  • Retention: 2.5µm
  • A world standard for critical gravimetric analysis
  • A Whatman cellulose filter is manufactured from high quality cotton linters treated to achieve a minimum alpha cellulose content of 98%
  • Typical analytical precipitates include barium sulphate, metastannic acid and finely precipitated calcium carbonate
Whatman 1442-047 Ashless Quantitative Filter Paper, 4.7cm Diameter, 2.5 Micron, Grade 42 (Pack of 100)

Whatman 10311612 Quantitative Filter Paper Circles, 4-7 Micron, Grade 595, 150mm Diameter (Pack of 100)

  • Diameter: 150mm
  • Filtration speed: 80 herzberg; typical thickness: 150µm; basis weight: 68g/m²
  • Retention: 4 - 7µm
  • Very popular, thin filter paper; medium-fast with medium to fine particle retention
  • Used for many analytical routine applications in different industries, e.g. particle separation from food extracts for sample preparation or filtration of solid environmental samples digested, e.g. for ICP/AAS analysis
Whatman 10311612 Quantitative Filter Paper Circles, 4-7 Micron, Grade 595, 150mm Diameter (Pack of 100)

Whatman 1441-110 Quantitative Filter Paper Circles, 20 Micron, Grade 41, 110mm Diameter (Pack of 100)

  • Diameter: 11.0cm
  • Retention: 20µm
  • Fastest ashless filter paper
  • Recommended for analytical procedures involving coarse particles or gelatinous precipitates (iron or aluminium hydroxides)
  • Used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates
Whatman 1441-110 Quantitative Filter Paper Circles, 20 Micron, Grade 41, 110mm Diameter (Pack of 100)

Whatman 10312209 Quantitative Filter Paper, 8-10 Micron, Grade 598, 90mm Diameter (Pack of 100)

  • Diameter: 90mm
  • Filtration speed: 50 herzberg; typical thickness: 320µm; basis weight: 140g/m²
  • Retention: 8 -10µm
  • Thick pleated filter paper with high loading capacity
  • Combines medium retention with medium fast to quick filtration speed
Whatman 10312209 Quantitative Filter Paper, 8-10 Micron, Grade 598, 90mm Diameter (Pack of 100)

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