Government Scientific Source

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Airflow Rate

144 s/100 mL/in2

4 s/100 mL/in2

96 s/100 mL/in2

21 s/100 mL/in2

3 s/100 mL/in2

Description

Grade 42 Ashless Filter Paper for Instrumental Analysis, 55 mm circle (100 pcs)

Pierce Western Blotting Filter Paper, Extra Thick, 8.5cm x 9cm

Grade 541 Ashless Fast Filter Paper, 47 mm circles (100 pcs)

Grade 40 Ashless Filter Paper for Pollution Analysis, 240 mm circle (100 pcs)

Grade 41 Fast Ashless Filter Paper, 110 mm circle (100 pcs)

Grade 42 Ashless Filter Paper for Instrumental Analysis, 240 mm circle (100 pcs)

Grade 50 Filter for Quantitative Analysis, Thin, 42.5 mm circle (100 pcs)

Pierce Western Blotting Filter Paper, Extra Thick, 20cm x 20cm

Grade 41 Fast Ashless Filter Paper, 47 mm circle (100 pcs)

Grade 42 Ashless Filter Paper for Instrumental Analysis, 90 mm circle (100 pcs)

Grade 42 Ashless Filter Paper for Instrumental Analysis, 47 mm circle (100 pcs)

Grade 40 Ashless Filter Paper for Pollution Analysis, 150 mm circle (100 pcs)

Grade 40 Ashless Filter Paper for Pollution Analysis, 55 mm circle (100 pcs)

Pierce Western Blotting Filter Paper, Extra Thick, 7cm x 8.4cm

Content And Storage

Store at room temperature.

Diameter Metric

110mm

150mm

18.5cm

42.5 mm

240mm

Content AndStorage

Store at room temperature.

Filtration Speed

ASTM, 250 seconds; Herzberg, 2685 seconds

ASTM, 75 seconds; Herzberg, 340 seconds

1870 sec.

ASTM, 12 seconds; Herzberg, 34 seconds

FiltrationSpeed

1870 sec.

ASTM, 75 seconds; Herzberg, 340 seconds

ASTM, 12 seconds; Herzberg, 54 seconds

Flow Rate

Medium

359mL/min

Fast

Slow

For Use With Application

For qualitative or quantitative filtrations requiring vacuum assistance on B++chner or 3-piece filter funnels.

Designed 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

Typical applications include fiber in animal foodstuffs, gelatine in milk and cream, chloride in cement, and chloride and phosphorous in coal and coke.

Excellent retention. Suitable for finest precipitates such as metastannic acid, barium sulfate, mercuric chromate, strontium sulfate. Used primarily for gravimetric and inorganic analyses, collecting precipitates that tend toward colloidal dispersions. Li

Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides).Also used in quantitative air pollution analys

Designed for gravimetric analysis and the preparation of samples for instrumental analysis.For critical gravimetric analysis with the finest particle retention.

Suitable for coarse and gelatinous precipitates requiring thorough washing on paper. Used in metallurgical labs for filtering iron and aluminum hydroxides, metallic aerosols and for determining silica in steel. Also used in environmental monitoring. Limit

Widely used for general gravimetric analysis. Retains medium-sized particles such as lead sulfate, calcium oxalate and magnesium ammonium sulfate. Limited wet strength.

Diameter Metric

55mm

7cm

47mm

90mm

15cm

Format

Circles

Circle

Grade

Grade 42

Grade 541

Grade 41

Grade

Grade 50

Grade 40

Item Description

GEG??s thinnest Whatman brand hardened filter paper, highly glazed Grade 50 supports vacuum filtration in B++chner funnels or Hirsch funnels and enables strong retention of very fine crystalline precipitates.

GEG–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.

Whatman Grade 40 high-purity filters from Cytiva's business are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.

GEG–s Whatman Grade 42 quantitative 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.

GEG??s Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration.

GEG??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.

GEG??s Whatman Grade 42 quantitative 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.

Particle Retention

8 µm

2.7 µm

5 to 10µmm

2.5 µm

22µm

1 to 5µmm

Pore Size Metric

2.5µm

8µm

2.7µm

Material

Alpha Cotton Cellulose

High-quality cotton linters

Membrane

Membrane Not Included

ParticleRetention

20µm

2.5 µm

20 to 25µmm

5 to 10µmm

Porosity

Coarse

Medium

PoreSize Metric

8µm

2.5µm

Porosity

Fine

Pore Size Metric

20µm

PoreSizeMetric

2.5µm

20µm

Quantity

100/Box

50 Sheets

100Pack

Quantity

100/Pk.

Thickness

115 µm

215 µm

200 µm

155 µm

210 µm

Thickness Metric

155µm

200µm

115µm

210µm

215µm

ThicknessMetric

215µm

200µm

Type

Hardened low ash

Hardened Ashless

Ashless

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19 results

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GSS-Sales@govsci.com | 800.248.8030 | www.govsci.com

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