WHATMAN QM-A Quartz Microfiber Filters

Cytiva

GE’s high-purity quartz microfiber filters are used in many air sampling filter applications, including sampling of acidic gases, stacks, flues, and aerosols. Filters are suitable for PM-10 sampling and analysis. High-purity quartz (SiO2) microfiber filters are used for air sampling in acidic gases, stacks, flues, and aerosols, particularly at high temperatures up to 800°C and in PM2.5/PM10 and trace element analysis. Due to the low level of alkaline earth metals, artifact products of sulfates and nitrates (from SO₂ and NO₂) are virtually eliminated. QM-A, sequentially numbered according to EPA standards, is suitable for most applications.

• Typical properties

Minimum retention efficiency in air (% @ 0.3 µm)	≥ 99.85
Typical retention efficiency in air (% @ 0.3 µm)	≥ 99.99
Nominal air flow (s/100 mL/in²)	6.3
Nominal thickness (µm)	475
Nominal basis weight (g/m²)	85
Maximum recommended temperature (°C)	800

• Ordering information – quartz fiber filter grades - Filter Circles

Dimensions (mm)	Catalog number	Quantity/Pack
25	1851-025	100
32	1851-032	100
37	1851-037	100
47	1851-047	100
50	1851-050	100
55	1851-055	100
82	1851-082	100
85	1851-085	100
90	1851-090	100
101.6	1851-101	100
110	1851-110	100
118	1851-118	100
150	1851-150	100

• Ordering information – quartz fiber filter grades - Filter Sheets

Dimensions (mm)	Catalog number	Quantity/Pack
8” × 10”	1851-8866 (prenumbered)	100
8” × 10”	1851-865	25

WHATMAN QM-A Quartz Microfiber Filters

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