Filters and Filtration

Devices and hardware for the filtration and analysis and purification of samples; includes complete kits, bottle-top filters, plates, storage bottles, stirred cells, membranes and papers, and other accessories in a range of sizes and materials.

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1 – 15 of 1,396 results

Fisherbrand™ Qualitative Filter Paper: Grade 6 Circles

Filters particles twice as fast as Qualitative Filter Paper Grade 5. Fisherbrand™ Qualitative Grade 6 Filters provide fine particle retention for boiler water analysis.

Pricing & Availability

Fisherbrand™ Wet-Strengthened Qualitative Filter Paper Circles

Coarse cellulose fiber papers remove particles >25μm

Pricing & Availability
Specifications

Flow Rate	Fast
Particle Retention	>25 μm
Format	Disc
Grade	P8
Material	Cellulose
Porosity	Coarse
For Use With (Application)	Use for coarse particles and gelatinous precipitates.

Fisherbrand™ Quantitative Grade Filter Paper Circles

Manufactured to reduce silicon dioxide, calcium oxide and ferric oxide levels

Pricing & Availability
Specifications

Format	Disc
Material	Alpha Cotton Cellulose

Fisherbrand™ Glass Fiber Circles

Faster flow, higher retention than cellulose filters

Pricing & Availability
Specifications

Flow Rate	Fast
Temperature (English) Max.	932°F
Temperature (Metric) Max	500°C
Material	Glass Fiber
Autoclavable	Autoclavable

Fisherbrand™ Qualitative Grade Plain Filter Paper Circles and Sheets - P2 Grade

Ideal for clarifying and removing particles of 1μm and larger, and in applications that do not require a low-ash or ashless paper

Pricing & Availability
Specifications

Particle Retention	1 to 5 μm
Format	Disc
Grade	P2
Porosity	Fine
Filtration Speed	5mL/min.
For Use With (Application)	Ideal for clarifying and removing particles of 1μm and larger, and in applications that do not require a low-ash or ashless paper

Fisherbrand™ Qualitative Grade Plain Filter Paper Circles - P5 Grade

Ideal for clarifying and removing particles of 1μm and larger, and in applications that do not require a low-ash or ashless paper

Pricing & Availability
Specifications

Flow Rate	Slow: 60mL/min.
Particle Retention	5 to 10 μm
Format	Disc
Grade	P5
Material	Cellulose
Porosity	Medium
Filtration Speed	230 sec.
For Use With (Application)	General lab uses: clinical and spot testing, clarifying pharmaceuticals

Fisherbrand™ Fluted Qualitative Filter Paper Circles

Cellulose fiber papers

Pricing & Availability
Specifications

Flow Rate	Fast
Particle Retention	25 μm
Format	Disc
Grade	P8 Fluted
Porosity	Coarse
For Use With (Application)	Use for coarse particles and gelatinous precipitates.

Fisherbrand™ Qualitative Grade Plain Filter Paper Circles - P8 Grade

Ideal for clarifying and removing particles of 20μm and larger, and in applications that do not require a low-ash or ashless paper.

Pricing & Availability
Specifications

Flow Rate	Fast: 160mL/min.
Particle Retention	20 to 25 μm
Format	Disc
Quantity	100/Pk.
Grade	P8
Material	Cellulose
Porosity	Coarse
Filtration Speed	55 sec.
For Use With (Application)	Suitable for coarse and gelatinous precipitates. Retains Fe(OH)3, Al(OH)3, metallic sulfides, iron ores. For clarifying solutions, oils. For zinc analysis (Fe ppt removal). Size 19cm (09-804) widely used for sugar analysis.

Fisherbrand™ Qualitative Grade Plain Filter Paper Circles and Sheets - P4 Grade

Ideal for clarifying and removing particles of 1μm and larger, and in applications that do not require a low-ash or ashless paper

Pricing & Availability
Specifications

Flow Rate	Slow: 25mL/min.
Particle Retention	4 to 8 μm
Format	Disc
Grade	P4
Porosity	Medium Fine
Filtration Speed	730 sec.
For Use With (Application)	General purpose: slightly slower, more retentive than P5. Retains MgNH4PO4, silver sulfide, cadmium sulfide. In air monitors, collects particulates and chromic acid mist

Fisherbrand™ Qualitative Grade Plain Filter Paper Sheets - P8 Grade

Ideal for clarifying and removing particles of 1μm and larger, and in applications that do not require a low-ash or ashless paper

Pricing & Availability
Specifications

Flow Rate	Fast: 160mL/min.
Particle Retention	20 to 25 μm
Format	Sheet
Grade	P8
Material	Cellulose
Porosity	Coarse
Filtration Speed	55 sec.
For Use With (Application)	Suitable for coarse and gelatinous precipitates. Retains Fe(OH)3, Al(OH)3, metallic sulfides, iron ores. For clarifying solutions, oils. For zinc analysis (Fe ppt removal). Size 19cm (09-804) widely used for sugar analysis.

Cytiva Whatman™ Binder-Free Glass Microfiber Filters, Grade 934-AH Circles

Designed for analysis of non-filterable residue and materials that require a high loading capacity glass microfiber filter. Whatman™ Binder-Free Glass Microfiber Filters, Grade 934-AH Circles are also used in cell harvesting, liquid scintillation, and monitoring pollution.

Pricing & Availability
Specifications

Particle Retention	1.5 μm
Temperature (English) Max.	932°F
Shape	Circle
Description	Whatman Grade 934-AH borosilicate glass microfiber filters from GE are smooth water quality filters with high retention efficiency. Grade 934-AH filters are often used in total suspended solids analysis.
Filtration Time	47 sec./100mL
Quantity	100 Pack
Grade	Grade 934-AH
Material	Borosilicate Glass
Thickness (Metric)	435 μm
Flow Rate	3.7 sec./100mL/in.²
Type	Filter for Total Suspended Solids Analysis
Basis Weight	64 g/m²
Format	Disc
Thickness (English)	0.017 in.
Surface Type	Smooth
Waterflow Rate	341 mL/min

Cytiva Whatman™ Quantitative Filter Paper: Grade 40 Circles

Supports accurate analysis in applications sensitive to very low levels of background contamination. Whatman™ Quantitative Filter Paper: Grade 40 Circles are additionally useful in gravimetric analysis where ash content might affect weight measurements of combusted samples.

Pricing & Availability
Specifications

Pore Size	8 μm
Particle Retention	8 μm
Airflow Rate	21 s/100 mL/in²
Quantity	100 Pk.
Grade	Grade 40
Material	Cotton Linters
Filtration Speed	ASTM, 75 seconds; Herzberg, 340 seconds
For Use With (Application)	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
Thickness (Metric)	210 μm
Flow Rate	Medium
Type	Quantitative Filter Paper
Format	Disc
Filter Type	Ashless
Porosity	Medium

Cytiva Whatman™ Quantitative Filter Paper: Grade 41 Circles

Use for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates or for quantitative air pollution analysis. Whatman™ Quantitative Filter Paper: Grade 41 Circles are commonly used in preparing samples for metal analysis after nitric acid digestion.

Pricing & Availability
Specifications

Thickness (Metric)	215 μm
Pore Size	20 μm
Flow Rate	Fast
Particle Retention	20 μm
Type	Quantitative Filter Paper
Format	Disc
Quantity	100 Pk.
Material	Cotton Linters
Porosity	Coarse
Filtration Speed	ASTM, 12 seconds; Herzberg, 54 seconds

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Cytiva Whatman™ Kjeldahl Analysis Weighing Paper, Grade B-2

Dissolves residue-free in acid solution, which is critical in applications such as Kjeldahl analysis of nitrogen in soil. Whatman Kjeldahl Analysis Weighing Paper, Grade B-2 is thin, lightweight, and low in nitrogen for accurate chemical analysis.

Pricing & Availability
Specifications

Thickness (Metric)	0.04 mm
Format	Sheet
Quantity	500 Pk.
Grade	B-2
Material	Parchment Paper

Cytiva Whatman™ Polydisc GW In-line Filters

Allows filtration of larger volumes of even heavily particle-laden samples. Whatman™ Polydisc GW In-Line Filters are batch certified for low background values for the determination of trace elements.

Pricing & Availability
Specifications

Pore Size	0.45 μm
Diameter (Metric) Disc	50 mm
Type	Polydisc GW Filter
Diameter (Metric)	52 mm
Housing Material	Polypropylene
Material (Membrane)	Polyamide
Volume (Metric)	Up to 200 mL
For Use With (Application)	Preparation of larger volumes of groundwater samples for the analysis of dissolved heavy metals
Autoclavable	Autoclavable
Max. Pressure	4.5 bar (65 psi)
Inlet Connection (Metric)	Tubing Nozzle 6 to 14 mm i.d. hose
Filtration Area	20.4 cm²

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Filters and Filtration

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Cytiva Whatman™ Kjeldahl Analysis Weighing Paper, Grade B-2 GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Cytiva Whatman™ Kjeldahl Analysis Weighing Paper, Grade B-2