Whatman™ Glass Microfiber Filters

Manufactured from 100% borosilicate glass, chemically inert and completely binder free. These depth filters combine fast flow rates with high loading capacity and the retention of very fine particles, extending into the sub-micron range.

Glass microfiber filters can be used at temperatures up to 500° C. They are ideal for use in applications involving air filtration and for gravimetric analysis of volatile materials where ignition is involved.

Whatman glass microfiber filters have a fine capillary structure and can absorb significantly larger quantities of water than an equivalent cellulose filter, making them suitable for spot tests and liquid scintillation counting methods. The filters can also be made completely transparent for subsequent microscopic examination.

General Filtration/Prefiltration: The particle loading capacity of a filtration system can be greatly increased by using a prefilter. Glass microfiber filters such as GF/B or GF/D are ideal because of the low resistance to fluid flow and high particle loading capacity. Whatman Multigrade GMF 150 is particularly valuable for the prefiltration of larger volumes and solutions that are normally difficult to filter.

Grade GF/A

1.6 µm. Highly efficient general filter. Suitable for suspended solids in all types of water and effluent and filtration of particulates in water, algae and bacterial cultures. Also widely used for air pollution monitoring.

Cat.No.	Diam	PK	Seal Color


15-1820-021	21mm	$64.14 100/PK	Add To Favorites
15-1820-024	24	$64.14 100/PK	Add To Favorites
15-1820-025	25	$64.14 100/PK	Add To Favorites
15-1820-037	37	$76.08 100/PK	Add To Favorites
15-1820-042	42.5	$81.28 100/PK	Add To Favorites
15-1820-047	47	$90.06 100/PK	Add To Favorites
15-1820-055	55	$94.46 100/PK	Add To Favorites
15-1820-070	70	$114.20 100/PK	Add To Favorites
15-1820-090	90	$171.28 100/PK	Add To Favorites
15-1820-110	110	$233.08 100/PK	Add To Favorites
15-1820-125	125	$294.46 100/PK	Add To Favorites
15-1820-150	150	$402.86 100/PK	Add To Favorites
15-1820-915	460 x 570 filter sheets	$1275.98 25/PK	Add To Favorites

Grade GF/B

1.0 µm. Thicker than GF/A with higher wet strength and increased loading capacity. Recommended for concentrated suspensions and retention of small particles. Suitable for suspended solids in industrial effluents, especially at high loading.

Cat.No.	Diam	PK	Seal Color


15-1821-021	21mm	$110.12 100/PK	Add To Favorites
15-1821-024	24	$112.28 100/PK	Add To Favorites
15-1821-025	25	$123.06 100/PK	Add To Favorites
15-1821-037	37	$151.14 100/PK	Add To Favorites
15-1821-042	42.5	$166.28 100/PK	Add To Favorites
15-1821-047	47	$196.48 100/PK	Add To Favorites
15-1821-055	55	$211.60 100/PK	Add To Favorites
15-1821-070	70	$280.70 100/PK	Add To Favorites
15-1821-090	90	$90.82 25/PK	Add To Favorites
15-1821-110	110	$105.48 25/PK	Add To Favorites
15-1821-125	125	$146.36 25/PK	Add To Favorites
15-1821-150	150	$213.78 25/PK	Add To Favorites
15-1821-914	460 x 570 filter sheets	$714.90 5/PK	Add To Favorites
15-1821-915	460 x 570 filter sheets	$2421.56 25/PK	Add To Favorites

Grade GMF 150

Unique multilayer glass microfiber filter, with a coarse top layer (10µm) and meshed with a fine layer of 1µm (Cat.Nos. 15-1841-047 and 15-1841-090) or 2µm (Cat.Nos. 15-1842-047 and 15-1842-090). The ideal prefilter for higher particulate loading capacity with faster flow rates.

Cat.No.	Diam	PK	Seal Color


15-1841-047	47mm	$126.40 40/PK	Add To Favorites
15-1841-090	90	$126.40 20/PK	Add To Favorites
15-1842-047	47	$126.40 40/PK	Add To Favorites
15-1842-090	90	$126.40 20/PK	Add To Favorites

Grade GF/C

1.2 µm. Combines fine particle retention with good flow rate. Used in many parts of the world for collection of suspended solids in potable water and natural and industrial waste. Widely used in biochemistry for cell harvesting, liquid scintillation counting and binding assays.

Cat.No.	Diam	PK	Seal Color


15-1822-021	21mm	$123.70 100/PK	Add To Favorites
15-1822-024	24	$129.98 100/PK	Add To Favorites
15-1822-025	25	$129.98 100/PK	Add To Favorites
15-1822-037	37	$148.84 100/PK	Add To Favorites
15-1822-042	42.5	$148.84 100/PK	Add To Favorites
15-1822-047	47	$197.08 100/PK	Add To Favorites
15-1822-055	55	$234.80 100/PK	Add To Favorites
15-1822-070	70	$164.88 100/PK	Add To Favorites
15-1822-090	90	$354.52 100/PK	Add To Favorites
15-1822-110	110	$564.00 100/PK	Add To Favorites
15-1822-125	125	$610.88 100/PK	Add To Favorites
15-1822-150	150	$1007.44 100/PK	Add To Favorites
15-1822-915	460 x 570 filter sheets	$1952.78 25/PK	Add To Favorites

Grade GF/D

2.7 µm. General purpose membrane prefilter with high loading capacity.

Cat.No.	Diam	PK	Seal Color


15-1823-021	21mm	$74.72 100/PK	Add To Favorites
15-1823-024	24	$74.72 100/PK	Add To Favorites
15-1823-025	25	$77.58 100/PK	Add To Favorites
15-1823-042	42.5	$97.16 100/PK	Add To Favorites
15-1823-047	47	$114.26 100/PK	Add To Favorites
15-1823-055	55	$131.72 100/PK	Add To Favorites
15-1823-070	70	$186.28 100/PK	Add To Favorites
15-1823-090	90	$74.72 25/PK	Add To Favorites
15-1823-110	110	$101.48 25/PK	Add To Favorites
15-1823-125	125	$131.72 25/PK	Add To Favorites
15-1823-150	150	$226.72 25/PK	Add To Favorites
15-1823-257	257	$276.38 25/PK	Add To Favorites
15-1823-915	460 x 570 filter sheets	$2532.90 25/PK	Add To Favorites

Grade GF/F

0.7 µm. Very high retention for filtering fine particles. Suitable for critical applications, including enumeration of Salmonella and Pseudomonas Aeroginosa, clarification of protein solutions and filtering samples and solvents prior to HPLC. EPA Standard for Toxicity Characteristic Leaching Procedure, Method 1311. Recommended for DNA binding and purification.

Cat.No.	Diam	PK	Seal Color


15-1825-021	21mm	$198.86 100/PK	Add To Favorites
15-1825-024	24	$209.56 100/PK	Add To Favorites
15-1825-025	25	$194.60 100/PK	Add To Favorites
15-1825-037	37	$256.60 100/PK	Add To Favorites
15-1825-042	42.5	$278.02 100/PK	Add To Favorites
15-1825-047	47	$269.28 100/PK	Add To Favorites
15-1825-055	55	$351.58 100/PK	Add To Favorites
15-1825-070	70	$411.66 100/PK	Add To Favorites
15-1825-090	90	$145.44 25/PK	Add To Favorites
15-1825-110	110	$213.82 25/PK	Add To Favorites
15-1825-125	125	$254.48 25/PK	Add To Favorites
15-1825-150	150	$389.68 25/PK	Add To Favorites
15-1825-257	257	$1196.86 25/PK	Add To Favorites

Grade EPM 2000

This air sampling filter has been developed and produced especially for use in high volume PM-10 air sampling equipment that collects atmospheric particulates and aerosols. It is manufactured from 100% pure borosilicate glass of special purity enabling detailed chemical analysis of trace pollutants with the minimum of interference or background. Whatman EPM 2000 was selected by the EPA to be the standard filter for use in the nationwide network of air samplers. Sheets are individually numbered to facilitate identification.

Cat.No.	Diam	PK	Seal Color


15-1882-047	4.7cm circles	$104.24 100/PK	Add To Favorites
15-1882-866	8 x 10 inch (prenumbered) sheets	$1054.76 100/PK	Add To Favorites

Grade QM-A

Ultrapure quartz (SiO₂) microfiber filter for critical work in air-pollution monitoring in stacks, flues, and aerosols up to 500° C. The filter is heat-treated, contains 5% borosilicate glass as a binder, and is extremely low in heavy metals and alkaline earth metals.

Cat.No.	Diam	PK	Seal Color


15-1851-037	3.7cm	$303.24 100/PK	Add To Favorites
15-1851-047	4.7	$329.62 100/PK	Add To Favorites
15-1851-055	5.5	$366.24 100/PK	Add To Favorites
15-1851-090	9	$691.46 100/PK	Add To Favorites
15-1851-865	8 x 10 inch (prenumbered) sheets	$722.22 25/PK	Add To Favorites
15-1851-8866	8 x 10 inch (prenumbered) sheets	$2972.40 100/PK	Add To Favorites

Grade 934-AH

1.5 µm. Smooth surface, high-retention borosilicate glass microfiber filter that withstands temperatures over 500° C. Specified in standard methods for determining total suspended solids in water, removal of turbidity, and filtration of bacterial cultures. Particularly recommended for water pollution monitoring, cell harvesting, liquid scintillation counting, and air-pollution monitoring.

Cat.No.	Diam	PK	Seal Color


15-1827-021	2.1cm	$32.66 100/PK	Add To Favorites
15-1827-024	2.4	$32.88 100/PK	Add To Favorites
15-1827-025	2.5	$36.71 100/PK	Add To Favorites
15-1827-032	3.2	$64.46 100/PK	Add To Favorites
15-1827-035	3.5	$47.62 100/PK	Add To Favorites
15-1827-037	3.7	$47.62 100/PK	Add To Favorites
15-1827-042	4.25	$91.89 100/PK	Add To Favorites
15-1827-047	4.7	$58.47 100/PK	Add To Favorites
15-1827-055	5.5	$60.91 100/PK	Add To Favorites
15-1827-070	7	$85.69 100/PK	Add To Favorites
15-1827-090	9	$127.90 100/PK	Add To Favorites
15-1827-110	11	$143.74 100/PK	Add To Favorites
15-1827-125	12.5	$195.86 100/PK	Add To Favorites
15-1827-150	15	$404.32 100/PK	Add To Favorites
15-1827-866	8 x 10 inch	$497.33 100/PK	Add To Favorites
15-1827-889	12 x 15 inch	$1360.94 100/PK	Add To Favorites

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