Packing: 25/100 sheets/box (Please confirm the specifications).

It has no binder, is 3 times thicker than GF/A, has higher wet strength, retains small particles well, has fast flow rate, and has a high liquid absorption rate. It is especially suitable for purifying turbid samples or high-temperature filtration of organic solvents, such as pretreatment of toxin samples, filtration of xylene solubles, etc. It is also often used as a battery separator and diagnostic kit medium.

Main Parameters:

Specification and model:

1821-150 (diameter 15cm) 25 sheets/box;
1821-037 (diameter 3.7cm) 100 sheets/box;
1821-110 (diameter 11.0cm) 25 sheets/box;
1821-915 (46 * 57cm) 25 sheets/box;
1821-090 (diameter 9.0cm) 25 sheets/box;
1821-185 (diameter 18.5cm) 25 sheets/box;
1821-047 (diameter 4.7cm) 100 sheets/box;
1821-024 (diameter 2.4cm) 100 sheets/box;
1821-021 (diameter 2.1cm) 100 sheets/box;
1821-025 (diameter 2.5cm) 100 sheets/box;
1821-125 (diameter 12.5cm) 25 sheets/box;
1821-055 (diameter 5.5cm) 100 sheets/box;
1821-070 (diameter 7.0cm) 100 sheets/box.

Diameter(mm)	25	47	55	70	90	110	125	150
Packaging(sheets)	100	100	100	100	25	25	25	25

Product Parameters:

[Brand] Whatman;
[Name] Glass fiber filter paper GF/B;
[Aperture] 1.0 μm;
[Thickness] 675 μm;
[Working temperature] <500℃;
[Filtration speed] 195 Herzberg(s);
[Air flow rate] 12 Gurley(s);
[Basic weight] 143 g/m²;
[Interception efficiency] >99.997%

Laboratory and Industrial Application Guide

Application Category	Recommended specifications
Routine laboratory applications – pharmaceutical laboratories
Ordinary high-efficiency filtration, such as pharmaceutical solutions, buffer solutions, culture media, etc.	GF/A, GF/C,934-AH, GF/F
Remove or retain fine precipitates and suspended matter from samples	GF/F.GF/6,TCLP,GF/A
Clarification of proteins in freeze drying	GF/C,GF/F
Gas chromatography, HPLC sample filtration preparation	GF/B,934-AH,GF/A,GF/C
Environmental monitoring (air, exhaust, water)
PM2.5, PM10, TSP sampling, determination of mass concentration and element source analysis, such as organic carbon, elemental carbon, heavy metals, polycyclic aromatic hydrocarbons, dipurines, etc.	QMA,QMH EPM2000,GF/A
PM10 and TSP sampling, small amount of organic matter source analysis	EPM2000,GF/A,GF/C
PM2.5, PM10 automatic online determination: β-ray method or infrared method monitoring	GF10 film roll
Fixed pollution source exhaust gas and automobile exhaust smoke sampling	QMA, GF/A
Nuclear and radioactive monitoring, scintillation counting	No.72,GF/A
Exhaust gas and smoke sampling under high temperature environment	QMA,QMH,Quartz Filter Cartridge
Fixed pollution source exhaust gas sampling under normal conditions, including fuel gas particulate matter	QMA,EPM2000,high purity glass fiber filter cartridge,Shiying filter cartridge
Determination of PCB, DDE, DDT, furan and dipurine in ambient air	GF8
Corrosive gas sampling	QMA,QMH,GF6
Dust collection or dust removal in heavy industrial workshops and factory areas	GF8,GF92
Determination of total suspended solids in industrial wastewater, environmental water, and water source water	934-AH,GF/C
Determination of chlorophyll in water source water and drinking water, repeated freeze-thaw method	GF/F, GF6
Determination of plankton residues	GF6
Filtration of algae	GF/A, GF/F.GF6
Determination of leaching toxicity of solid waste	TCLP,GF/F
Battery separator, energy storage device
Lithium-ion battery GF/D, GF/A, GF/C	GF/D,GF/A, GF/C
Lithium-air battery GF/F, GF/B, GF/C, GF/A	GF/F,GF/B,GF/C,GF/A
Alkaline battery GF/A	GF/A
Flexible energy storage electrode film substrate GF/A, GF/F	GF/A,GF/F
Electronic devices, such as sensors
Fire detector sensor	GF/M,QMA,QMB,GF92
Gas detector or detector, removes smoke and moisture before gas measurement	QMA,GF/M,GF10,GF92
Electrochemical sensor sensing medium	GF/B,GF/D,GF/F
Food Industry
Determination of insoluble pollutants in animal and vegetable oils	GF/D
Determination of pesticide residues by gas chromatography (GC) or HPLC	GF92
Purification and filtration of supernatants of samples such as aflatoxin and ochratoxin	934-AH,GF/B
Carrying samples when determining oil content	GF/A
Determination of riboflavin in foods and vitamin products	GF/A
Determination of sulfur-containing amino acids in foods, ingredient feeds, and processed foods	GF/A
Determination of tryptophan in food-grade component foods and feeds	GF/A
Determination of fructose, glucose, maltose, and sucrose in milk chocolate	GF/F
Carrying samples when determining moisture in foods	GF/A
Beer and wine industry
Determination of total suspended solids and total dissolved solids in feed and process water	934-AH,GF/C
Determination of bitter esters	GF/C
Determination of condensate or solids	GF92.GF/C
Removal of proteins from difficult-to-filter beers	GF6
Filter preparation of samples for gas chromatography (GC)	GF/C,GF/A,934-AH
Petroleum, chemical industry, electroplating
Pre-treatment filtration of polypropylene xylene or trichlorotoluene solution	GF/B, GF/F
Filtration of electrolyte during particle size determination	GF/F
Determination of sediment and impurities in finished oil	GF/A
Determination of suspended particles in oilfield wastewater	934-AH,GF/C
Determination of cleanliness of mechanical parts by stain method	GF/A,GF/F
In vitro diagnostics*
Scintillation counting of proteins, cells, tissue fragments, etc.	GF/C, GF6. GF/F,TCLP
Lateral flow whole blood separation membrane	LF1,MF1, VF2,GF/DVA,Fusion 5
Lateral flow conjugate release pad	Accuflow G,Rapid 24,Rapid 27, 33 glass,Standard 14,Star