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Showing 21–30 of 940 items.

Whatman 1005-185 Quantitative Filter Paper Circles, 2.5 Micron, 94 s/100mL/sq inch Flow Rate, Grade 5, 185mm Diameter (Pack of 100)

  • 18.5cm
  • Grade 5
  • Used in qualitative analytical techniques to determine and identify materials
  • Has the maximum degree of fine particle filtration (2.5µm) in the qualitative range; capable of retaining the fine precipitates encountered in chemical analysis
  • Slow flow rate; excellent clarifying filter for cloudy suspensions and for water and soil analysis
Whatman 1005-185 Quantitative Filter Paper Circles, 2.5 Micron, 94 s/100mL/sq inch Flow Rate, Grade 5, 185mm Diameter (Pack of 100)

Whatman 1440-047 Quantitative Filter Paper Circles, 8 Micron, Grade 40, 47mm Diameter (Pack of 100)

  • Diameter: 4.7cm
  • 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 1440-047 Quantitative Filter Paper Circles, 8 Micron, Grade 40, 47mm Diameter (Pack of 100)

Whatman 1001-055 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 55mm Diameter (Pack of 100)

  • 5.5cm
  • Grade 1
  • Covers a wide range of laboratory applications; frequently used for clarifying liquids
  • Areas of use include the food industry, agriculture, air pollution monitoring, and gas detection
  • Widely used in education for teaching simple qualitative analytical separations
Whatman 1001-055 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 55mm Diameter (Pack of 100)

Whatman 1442-042 Quantitative Filter Paper Circles, 2.5 Micron, Grade 42, 42.5mm Diameter (Pack of 100)

  • Diameter: 4.25cm
  • Retention: 2.5µm
  • A world standard for critical gravimetric analysis with the finest particle retention of all Whatman cellulose filter papers
  • 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 1442-042 Quantitative Filter Paper Circles, 2.5 Micron, Grade 42, 42.5mm Diameter (Pack of 100)

Whatman 4716H35PK 1441150 Grade 41 Quantitative Filter Paper Ashless Filter Circles, 150 mm Max Volume 1764 ml/m (Pack of 100)

  • Fast filtration of coarse or gelatinous precipitates (20-25 µm particle retention)
  • Acid washed, ash content 0.007%
  • Especially suitable for iron or aluminum hydroxides; rough surface
  • Widely used in determining silicon in iron and steel analysis
  • Used for quantitative air pollution analysis when determining gaseous compounds at high flow rates
Whatman 4716H35PK 1441150 Grade 41 Quantitative Filter Paper Ashless Filter Circles, 150 mm Max Volume 1764 ml/m (Pack of 100)

Whatman 1002-090 Quantitative Filter Paper Circles, 8 Micron, 21 s/100mL/sq inch Flow Rate, Grade 2, 90mm Diameter (Pack of 100)

  • 9.0cm
  • Grade 2
  • Used in qualitative analytical techniques to determine and identify materials
  • General filtration in the 8µm particle size range
  • More absorbent than Grade 1; for example, it is able to hold soil nutrient in plant growth trials
Whatman 1002-090 Quantitative Filter Paper Circles, 8 Micron, 21 s/100mL/sq inch Flow Rate, Grade 2, 90mm 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 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 1440-125 Ashless Quantitative Filter Paper, 12.5cm Diameter, 8 Micron, Grade 40 (Pack of 100)

  • Diameter: 12.5cm
  • 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 1440-125 Ashless Quantitative Filter Paper, 12.5cm Diameter, 8 Micron, Grade 40 (Pack of 100)

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