Quartz Fiber Filters

• Highly resistant to chemical attack, biologically inert
• High Purity: Very low trace metal content, does not adsorb NOx and SOx dioxides; Grade QR-100 is prefired at 1,000°C for 2 hours to reduce organic contamination
• Easily sterilized: Can be baked or autoclaved
• Store indefinitely: Unaffected by humidity

APPLICATIONS
• Sample acidic gases at high (>500°C) temperatures
• Air pollution analysis

ORDERING INFORMATION Order by specifying first the grade of filter then the diameter, e.g. QR-200 125mm, QR100 21mm.


SPECIFICATIONS : GLASS /QUARTZ FIBER FILTERS

Grade	Applications/Characteristics	Weight (g/m2)	Thickness (mm)	Nominal Rating (µm)	Water Flow Time*1 (sec)	Collection Efficiency (%, 0.3 µm DOP)	Pressure Drop (kPa at 5 cm/sec)	Binder*	Maximum Operating Temperature (°C)	Conversion
										Whatman	ex-Schleicher & Schuell	Pall	Millipore	Ahlstrom
GA-55	Thin filter recommended for clarifying filtration. Air pollution monitoring.	55	0.21	0.6	23	99.9	0.33	None	500	GF/A (934AH)	31		APFA	111
GF-75	Highest collection efficiency grade offered. Collection of very fine particles.	75	0.35	0.3	84	99.999	1.67	None	500	GF/F	20		GFCP	151
GA-100	Faster filtration speed recommended for filtering viscous fluids.	110	0.44	1.0	11	96	0.20	None	500
GA-200	Thick filter with high dust holding capacity recommended for filtering viscous fluids.	175	0.74	0.8	15	99.9	0.35	None	500
GB-100R	High and low volume aerosols for airborne dust and metal contaminants Low trace metal contents	95	0.38	0.6	15	99.99	0.30	None	500	EPM2000	1HV	A/E (Use for air)	AP40
GB-140	High dust holding capacity recommended for SS (Suspended Solid) analysis.	140	0.56	0.4	58	99.99	1.11	None	500	GF/B	32		APFB	121
GC-50	Thin filter with high collection efficiency Prefilter for membrane filter Scintillation counting	48	0.19	0.5	28	99.99	0.52	None	500	GF/C	30/25	A/E (Use for water)	AP40/ APFC	131
GC-90	Filter with organic binder recommended for fine particles and aerosols. Prefilter for membrane filter.	100	0.30	0.5	20	99.99	0.42	Organic	120				AP15
GD-120	Medium collection efficiency grade Prefilter for membrane filter	123	0.51	0.9	14	97	0.17	None	500	GF/D	40		APFD	141
GS-25	Filter with organic binder recommended for SS (Suspended Solid) analysis. Higher strength and lower released fibers compared with no-binder grades.	70	0.21	0.6	15	99.9	0.32	Organic	120	-			AP20	164
DP-70	Filter with organic binder recommended for high concentrated liquid of protein and other substances. Prefilter for membrane filter.	170	0.52	0.6	20	-	0.52	Organic	120	-			AP25
QR-200	Thick quartz fiber filter with inorganic binder Low adsorption Monitor airborne particulates.	200	1.0	-	-	99.9	0.34	Inorganic	1,000
QR-100	Quartz fiber filter without binder Superior chemical resistance does not adsorb acid gases.	85	0.38	-	-	99.99	0.45	None	1,000	QM-A		Micro Quartz

*1. Flow time is the time in seconds to filter 1,000 mL of distilled water at 20 °C under differential pressure of 39 kPa through a 9.6 cm 2 section of filter.
*Binder 1. Organic – Acrylic Acid Ester Emulsion. 2. Inorganic – Alumina