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Your source for innovative, indispensable lab equipment, lab supplies, and services. View their wide selection of products for scientific research and education.

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Filtration Products

Filtration Membrane Discs

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Airflow Rate

3 s/100 mL/in2

64 s/100 mL/in2

Bubble Point

G??1.0 bar, air with water

G??3.52 bar, air with water

29psi

46psi

101psi

22psi

50psi

0.45bar

G–0.42 bar, air with water

Autoclavable

Yes

BottomShape

Flat

Color

White

Description

Grade 541 Ashless Fast Filter Paper, 90 mm circles (100 pcs)

Grade 542 Ashless Fine Precipitate FIlter, 90 mm circles (100 pcs)

Diameter Metric Outer

13mm

25mm

47mm

100mm

Flow Rate

359mL/min

For Use With Application

Air analysis; cell biology; cell culture; bioassays; cytology; environmental analysis; epifluorescence.

For all analytical, ultracleaning, and sterilizing applications at temperatures below 75°C (167°F) – except those involving esters, ether-alcohols, ketones, nitroparaffins or strong acids and bases.

For air monitoring, bioassays, dairy microbiology, particle monitoring, and particle removal

For use in Air monitoring; Fluid monitoring; Particle collection and analysis; QC of fluid holding tanks.

Air/gas-filtration

Permit use for aqueous filtration without wetting and organic solvent filtrations such as HPLC

Recommended for viewing sample on filter surface: observation of sample with optical or electron microscopes; cold sterilization, tissue culture, fractionation, blood studies, virology, general separations.

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

Used in gravimetric metal determinations.

Dimensions LxW

3.93 x 3.93 in. (100 x 100 mm)

Diameter Metric

90 mm

90mm

Diameter Metric Filter

47mm

GasFlow Rate

1.0L/min./cm sq.

10.0L/min./cm sq.

FiltrationSpeed

ASTM, 250 seconds; Herzberg, 2510 seconds

ASTM, 12 seconds; Herzberg, 34 seconds

FilterType

Membrane

Gas Flow Rate

32L/min/cm sq.

10.0L/min./cm sq.

2L/min/cm sq.

1.5L/min./cm sq.

3.2L/min./cm sq.

1.7L/min./cm sq.

2L/min/cm2

1.0L/min./cm sq.

16L/min/cm sq.

For Use With Equipment

Balance

Format

Circles

Grade

Grade 542

Grade 541

Item Description

GEG??s Whatman Grade 542 filters are acid hardened to allow high retention of fine precipitates in applications such as metal determinations and hydroxide collection.

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.

Liquid Flow Rate

18.0mL/min./cm sq.

13.5mL/min./cm sq.

29.0mL/min./cm sq.

0.5mL/min./cm sq.

580mL/min/cm sq.

6.0mL/min./cm sq.

LiquidFlow Rate

190mL/min/cm sq.

80mL/min. (Isopropanol)

32.0mL/min./cm sq.

6.9mL/min./cm2

18mL/min/cm sq.

6.0mL/min./cm sq.

29.0mL/min./cm sq.

18.0mL/min./cm sq.

Membrane Type

Plain

PoreSize

0.8µm

0.2µm

0.45µm

5µm

0.22-µm

1.2µm

0.4µm

Shape

Square

Thickness Metric

155µm

Material

Paper

Nylon (NYL)

Mixed Cellulose Esters (MCE)

Mixed Cellulose Esters (MCE) (Nitrate and Acetate)

Polytetrafluoroethylene (PTFE)

Polycarbonate Track-Etched (PCTE)

Polyvinylidene Fluoride (PVDF)

High-quality cotton linters

Polycarbonate (PC)

Length Metric

100 mm

Membrane

Nylon

Cellulose

PVDF

Pore Size

0.5µm

3.0µm

0.03µm

0.1µm

0.45µm

3µm

0.2μm

0.2µm

0.4μm

ParticleRetention

22µm

2.7 µm

Length English

3.93 in.

Quantity No per Case

25/pk.

100/pk.

Quantity No. per Case

100/pk.

MembraneType

Plain

Porosity

Fine

Porosity

Coarse

Thickness

100-µm

105µm

125-µm

135-µm

150-µm

0.03 mm

155 µm

Type

Weighing Paper

Filtration Membrane Disc

Hardened Ashless

Membrane Filter

Plain

Wettability

Hyfrophilluc

Hydrophilic

Hydrophobic

Quantity NoperCase

100/pk.

Quantity

100/Pk.

Sterility

Sterile

Thickness

125µm

Weight Metric

40 g/m2

thickness

150 µm

Width English

3.93 in.

Width Metric

100 mm

If you are viewing this page as a nonregistered user, the price(s) displayed is list price. To view your customer-specific pricing, log in or become a registered user here.

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