VWR? Glass Fiber Filters

Binder-free VWR? glass fiber filters feature fast flow rates� high-loading capacity� wide thermal tolerance� and excellent precipitate retention. Available in three grades: Grade 691 is an ideal filter for radioimmunoassay of weak beta emitters by scintillation counting� and for filtration of precipitated proteins� cells� and cell debris. Also used for gravimetric determination of airborne particulates. Grade 693 is recommended for use in dissolved and suspended solids testing in sanitary water analysis procedures. Grade 696 is used for monitoring specific pollutants (e.g.� Hg in water)� and in marine chemistry to filter particulate components in seawater. Also used in RIA procedures and for harvesting lymphocytes during incorporation trials.

Flow Rate	Fast
Grade	691	693	691	696
Particle Retention	1.5 ��m	1.1 ��m	1.5 ��m	1.2 ��m
Porosity	Fine

货号

Grade	Diameter	VWR Catalog Number	Unit
691	2.1 cm	28297-976	Pack of 100
691	2.4 cm	28297-978	Pack of 100
691	4.2 cm	28297-982	Pack of 100
691	4.7 cm	28333-129	Pack of 100
691	5.5 cm	28297-984	Pack of 100
691	9.0 cm	28297-289	Pack of 100
691	11.0 cm	28297-974	Pack of 100
691	12.5 cm	28333-127	Pack of 100
691	15.0 cm	28333-125	Pack of 100
693	2.4 cm	28297-500	Pack of 100
693	4.2 cm	28297-504	Pack of 100
693	5.5 cm	28297-506	Pack of 100
693	7.0 cm	28297-508	Pack of 100
693	9.0 cm	28297-510	Pack of 100
696	2.4 cm	28333-143	Pack of 100
696	4.7 cm	28333-139	Pack of 100
696	5.5 cm	28333-137	Pack of 100
696	9.0 cm	28333-135	Pack of 100
696	11.0 cm	28333-133	Pack of 100
696	12.5 cm	28333-131	Pack of 100

Grade GF/A Glass Microfiber Filters� Whatman?

Used in biochemistry for the filtration of precipitated proteins� cells� and cell debris. An ideal filter for radio-immunoassay of weak beta emitters by scintillation counting. A standard for gravimetric determination of airborne particulates. Binder-free.

Flow Rate	Fast
Particle Retention	1.6 ��m
Porosity	Fine

货号

Size	Supplier No.	VWR Catalog Number	Unit
11 dia. cm	1820-110	28497-222	Pack of 100
12.5 dia. cm	1820-125	28497-244	Pack of 100
15 dia. cm	1820-150	28497-255	Pack of 100
2.1 dia. cm	1820-021	28497-084	Pack of 100
2.4 dia. cm	1820-024	28497-109	Pack of 100
2.5 dia. cm	1820-025	28497-110	Pack of 100
3.7 dia. cm	1820-037	28497-120	Pack of 100
4.25 dia. cm	1820-042	28497-142	Pack of 100
4.7 dia. cm	1820-047	28497-153	Pack of 100
46 x 57 cm	1820-915	83009-312	Pack of 25
5.5 dia. cm	1820-055	28497-164	Pack of 100
7 dia. cm	1820-070	28497-186	Pack of 100
9 dia. cm	1820-090	28497-200	Pack of 100

Grade 934-AH? Glass Microfiber Filters� Whatman?

Binder-free� high-purity borosilicate glass microfiber filters are used in the determination of total suspended solids� removal of turbidity� and filtration of bacterial cultures as well as in a wide range of water monitoring applications. High loading capacity allows processing of very turbid samples. Provide superior fine particle retention (1.5��m) at high flow rates. Withstand temperatures up to 550��C (1022��F).

Ordering Information:For grade 934-AH glass microfiber filters in a RTU (ready-to-use) format� see97040-974series.

Basis Weight	64 g/m2
Filtration speed	47 sec./100 mL (Herzberg)
Particle Retention in Liquid	1.5 ��m (Particle retention rating at 98% efficiency)
Typical Thickness	435 ��m
Wet Burst	17 in. (water)

货号

Size	Supplier No.	VWR Catalog Number	Unit
11 dia. cm	1827-110	28496-955	Pack of 100
12.5 dia. cm	1827-125	28496-966	Pack of 100
18.5 dia. cm	1827-185	28496-968	Pack of 100
2.1 dia. cm	1827-021	28496-751	Pack of 100
2.4 dia. cm	1827-024	28496-773	Pack of 100
2.5 dia. cm	1827-025	28297-418	Pack of 100
24 dia. cm	1827-240	28496-970	Pack of 100
3.2 dia. cm	1827-032	28496-795	Pack of 100
3.5 dia. cm	1827-035	28496-809	Pack of 100
3.7 dia. cm	1827-037	28496-853	Pack of 100
30.5 x 38.1 cm	1827-889	28497-991	Pack of 100
3 dia. cm	1827-030	28496-785	Pack of 100
4.25 dia. cm	1827-042	28496-875	Pack of 100
4.7 dia. cm	1827-047	28496-886	Pack of 100
5.5 dia. cm	1827-055	28496-897	Pack of 100
7 dia. cm	1827-070	28496-911	Pack of 100
9 dia. cm	1827-090	28496-933	Pack of 100

Grade 934-AH? RTU Glass Microfiber Filters� Whatman?

Ready-to-use (RTU) filters are supplied pre-washed and weighed according to standard method 2540D� eliminating the need for pre-treating the product prior to use. Each RTU filter is packaged within an aluminum pan with the filter weight clearly printed on a heat-resistant label.

Binder-free� high-purity borosilicate glass microfiber filters are used in the determination of total suspended solids� removal of turbidity� and filtration of bacterial cultures as well as in a wide range of water monitoring applications. High loading capacity allows processing of very turbid samples. Provide superior fine particle retention (1.5��m) at high flow rates. Withstand temperatures up to 550��C (1022��F).

Basis Weight	64 g/m2
Filtration speed	47 sec./100 mL (Herzberg)
Particle Retention in Liquid	1.5 ��m (Particle retention rating at 98%)
Typical Thickness	435 ��m
Wet Burst	17 in. (water)

货号

Diameter	Supplier No.	VWR Catalog Number	Unit
4.3 cm		97040-974	Case of 1200
			Pack of 100
4.7 cm	9907-047	97040-976	Case of 1200
			Pack of 100
5.5 cm	9907-055	97040-978	Case of 1200
			Pack of 100

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