Selection Guide: Membranes and Devices for Air Analysis Applications

Membranes for Acid Rain Analysis

Media	Nylasorb™	Zefluor™
Description	Pure 1 µm nylon developed specifically for the requirements of acidic dry deposition (acid rain) measurements. Assures accurate analysis of sulfates and nitrates with low background levels of nitrates and sulfates.	Low chemical background for highly sensitive determinations. Suited for monitoring acid rain, poly-nuclear aromatic hydrocarbons, and particulate. 0.5 µmpore size meets new NIOSH specifications.
Filter Media	Nylon	PTFE with PTFE support
Pore Size	1 µm (nominal)	0.5, 1, 2, and 3 µm
Typical Filter Thickness	90 µm (3 mils)	0.5 µm: 178 µm (7 mils) 1 µm: 165 µm (6.5 mils) 2 and 3 µm: 152 µm (6 mils)
Typical Filter Weight	N/A	N/A
Typical Aerosol Retention (Following ASTM D 2986-95A 0.3 um DOP at 32 L/min/100 cm2 filter media	N/A	0.5, 1, and 2 µm: 99.99% 3 µm: 99.98%
Typical Air Flow Rate	N/A	L/min/cm2 at 0.7 bar (70 kPa, 10 psi) 0.5 µm: 1 1 µm: 14.6 2 µm: 25.3 3 µm: 53
Typical Water Flow Rate	N/A	N/A
Maximum Operating Temperature	180 ºC (356 ºF)	N/A

Devices and Accessories for Acid Rain Analysis

• 37 and 47 mm Open-faced Aluminum Filter Holders

Membranes for Aggressive Environments/Aerosol Testing

Media	Pallflex Tissuquartz™	Pallflex Emfab™	Pallflex Fiberfilm™
Description	Binder-free pure quartz offers superior chemical purity. High flow rate and filtration efficiency. Uniquely designed for air monitoring in high temperatures and aggressive atmospheres.	Borosilicate microfibers reinforced with woven glass cloth and bonded with PTFE. Flushed with DI water to remove water-soluble residue. Low moisture and low air resistance. Withstands folding for weighing and transport. Preferred filter for ambient air sampling and stack emission testing.	Unique combination of heat-resistant borosilicate glass fibers and moisture-resistant fluorocarbon. Moisture variations in air or gases will not cause chemical reactions on the filter. Low moisture pickup and low nominal air resistance. Ideal for diesel exhaust sampling.
Filter Media	Pure quartz, no binder	Borosilicate glass microfibers reinforced with woven glass cloth and bonded with PTFE	Heat resistant borosilicate glass fiber coated with fluorocarbon (TFE)
Pore Size	N/A	N/A	N/A
Typical Filter Thickness	432 µm (17 mils)	178 µm (7 mils)	203 µm (8 mils)
Typical Filter Weight	5.8 mg/cm2	5.0 mg/cm2	3.4 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media	99.90%	99.95%	96.40%
Typical Air Flow Rate	73 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	68 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	180 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)
Typical Water Flow Rate	220 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)	32 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)	220 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)
Maximum Operating Temperature	Air 1093 ºC (2000 ºF)	Air 260 ºC (500 ºF)	Air 315.5 ºC (600 ºF)

Devices and Accessories for Aggressive Environments/Aerosol Testing

• 47 mm In-line Filter Holders

Membranes for Asbestos/Fibers Testing

Media	GN-6 Metricel®	GN-4 Metricel
Description	GN-6 (0.45 um) Metricel membranes are mixed cellulose esters certified for the microbiological analysis of potable, waste, process and natural waters in accordance with the Membrane Filter (MF) Technique.	GN-4 (0.8 µm) Metricel membranes are mixed cellulose esters that dissolve completely using standard digestion procedures. These membranes clear completely, possess low artifacts, and offer minimal interference in fiber counting.
Filter Media	Hydrophilic mixed cellulose esters	Hydrophilic mixed cellulose esters
Pore Size	0.45 um	0.8 µm
Typical Filter Thickness	152 µm (6 mils)	152 µm (6 mils)
Typical Filter Weight	4 mg/cm2	4 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media	N/A	N/A
Typical Air Flow Rate	N/A	55 L/min/3.7 cm2 at 0.9 bar (90 kPa, 13.5 psi)
Typical Water Flow Rate	> 65 mL/min/cm2 at 0.7 bar (70 kPa, 10 psi)	129 mL/min/cm2 at 0.7 bar (70 kPa, 10 psi)
Maximum Operating Temperature	Water  74 ºC (165 ºF)	Water 74 °C (165 °F)

Devices and Accessories for Asbestos/Fibers Testing

• 25 mm Air Monitoring Cassettes and 25 mm Support Pads
• 37 mm Air Monitoring Cassettes and 37 mm Support Pads
• Analyslide® Petri Dish

Membranes for Diesel Fuel Testing

Media	Pallflex Emfab™	Pallflex Fiberfilm™
Description	Borosilicate microfibers reinforced with woven glass cloth and bonded with PTFE. Flushed with DI water to remove water-soluble residue. Low moisture and low air resistance. Withstands folding for weighing and transport. Preferred filter for ambient air sampling and stack emission testing.	Unique combination of heat-resistant borosilicate glass fibers and moisture-resistant fluorocarbon. Moisture variations in air or gases will not cause chemical reactions on the filter. Low moisture pickup and low nominal air resistance. Ideal for diesel exhaust sampling.
Filter Media	Borosilicate glass microfibers reinforced with woven glass cloth and bonded with PTFE	Heat resistant borosilicate glass fiber coated with fluorocarbon (TFE)
Pore Size	N/A	N/A
Typical Filter Thickness	178 µm (7 mils)	203 µm (8 mils)
Typical Filter Weight	5.0 mg/cm2	3.4 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media	99.95%	96.40%
Typical Air Flow Rate	68 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	180 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)
Typical Water Flow Rate	32 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)	220 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)
Maximum Operating Temperature	Air 260 ºC (500 ºF)	Air 315.5 ºC (600 ºF)

Devices and Accessories for Diesel Fuel Testing

• 47 mm In-line Filter Holders

Membranes for Gravimetric Analysis

Continue scrolling for additional membranes for gravimetric analysis.

Media	A/E Glass Fiber	GLA-5000	Zefluor™
Description	Binder-free borosilicate glass fiber is recommended by EPA for high-volume air sampling to collect atmospheric particles and aerosols.	5 µm polyvinyl chloride (PVC) filters feature low ash, low moisture pickup, light tare weight, and are gravimetrically stable. Ideally suited for multiple NIOSH analytical methods including silica monitoring.	Low chemical background for highly sensitive determinations. Suited for monitoring acid rain, poly-nuclear aromatic hydrocarbons, and particulate. 0.5 µm pore size meets new NIOSH specifications.
Filter Media	Borosilicate glass without binder	Polyvinyl chloride (PVC)	PTFE with PTFE support
Pore Size	1 µm (nominal)	5 µm	0.5, 1, 2, and 3 µm
Typical Filter Thickness	330 µm (13 mils)	0.8 µm: 152 µm (6.0 mils)	0.5 µm: 178 µm (7 mils) 1 µm: 165 µm (6.5 mils) 2 and 3 µm: 152 µm (6 mils)
Typical Filter Weight	N/A	N/A	N/A
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	99.98%	99.94%	0.5, 1, and 2 µm: 99.99% 3 µm: 99.98%
Typical Air Flow Rate	60 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	53 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	L/min/cm2 at 0.7 bar (70 kPa, 10 psi) 0.5 µm: 1 1 µm: 14.6 2 µm: 25.3 3 µm: 53
Typical Water Flow Rate	250 mL/min/cm2 at 0.3 bar (30 kPa, 5 psi)	N/A	N/A
Maximum Operating Temperature	Air 550 °C (1022 °F)	Water 52 °C (125 °F)	N/A

Media	DM Metricel®	Pallflex Emfab™
Description	Vinyl/acrylic copolymer membrane has excellent chemical resistance. Low moisture pickup provides gravimetric stability. Transmission through the infrared range makes this membrane ideal for direct analysis of silica in airborne particulate matter.	Borosilicate microfibers reinforced with woven glass cloth and bonded with PTFE. Flushed with DI water to remove water-soluble residue. Low moisture and low air resistance. Withstands folding for weighing and transport. Preferred filter for ambient air sampling and stack emission testing.
Filter Media	Vinyl/acrylic copolymer	Borosilicate glass microfibers reinforced with woven glass cloth and bonded with PTFE
Pore Size	0.45 and 0.8 µm	N/A
Typical Filter Thickness	0.45 µm: 114 µm (4.5 mils)	178 µm (7 mils)
Typical Filter Weight	3 mg/cm2	5.0 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	N/A	99.95%
Typical Air Flow Rate	L/min/cm2 at 0.9 bar (90 kPa, 13.5 psi) 0.45 µm: 30 0.8 µm: 47	68 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)
Typical Water Flow Rate	mL/min/cm2 at 0.9 bar (90 kPa, 13.5 psi) 0.45 µm: 44 0.8 µm: 108	32 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)
Maximum Operating Temperature	Water 66 °C (151 °F)	Air 260 ºC (500 ºF)

Media	Pallflex Tissuquartz™	Teflo
Description	Binder-free pure quartz offers superior chemical purity. High flow rate and filtration efficiency. Uniquely designed for air monitoring in high temperatures and aggressive atmospheres.	PTFE with unique polymethylpentene (PMP) support ring for PM-10 dichotomous, PM-2.5, and other air sampling techniques. Offers increased durability and low chemical background for X-ray fluorescence, radiometric or gravimetric techniques of elemental analysis.
Filter Media	Pure quartz, no binder	PTFE with PMP (polymethylpentene) support ring
Pore Size	N/A	N/A
Typical Filter Thickness	432 µm (17 mils)	1 µm: 76 µm (3 mils) 2 µm: 46 µm (1.8 mils) 3 µm: 30.4 µm (1.2 mils)
Typical Filter Weight	5.8 mg/cm2	N/A
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	99.90%	1 and 2 µm: 99.99% 3 µm: 99.79%
Typical Air Flow Rate	73 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	L/min/cm2 at 0.7 bar (70 kPa, 10 psi) 1 µm: 17 2 µm: 53 3 µm: 90
Typical Water Flow Rate	220 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)	N/A
Maximum Operating Temperature	Air 1093 ºC (2000 ºF)	N/A

Devices for Diesel Fuel Analysis

• 37 mm Air Monitoring Cassettes
• 25 mm Open-face Delrin* Holder
• 37 and 47 mm Open-face Aluminum Holders
• Analyslide® Petri Dish

Membranes for Ion Exchange

Membranes for Lead Testing

Media	GN-4 Metricel®
Description	GN-4 (0.8 µm) Metricel membranes are mixed cellulose esters that dissolve completely using standard digestion procedures.  these membranes clear completely, possess low artifacts, and offer minimal interference in fiber counting.
Filter Media	Hydrophilic mixed cellulose esters
Pore Size	0.8 µm
Typical Filter Thickness	152 µm (6 mils)
Typical Filter Weight	4 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media	N/A
Typical Air Flow Rate	55 L/min/3.7 cm2 at 0.9 bar (90 kPa, 13.5 psi)
Typical Water Flow Rate	129 mL/min/cm2 at 0.7 bar (70 kPa, 10 psi)
Maximum Operating Temperature	Water 74 °C (165 °F)

Devices and Accessories for Lead Testing

• 37 mm Air Monitoring Cassettes and 37 mm Support Pads

Membranes for Nuisance Dust Testing

Media	GLA-5000 PVC	DM Metricel®
Description	5 µm polyvinyl chloride (PVC) filters feature low ash, low moisture pickup, light tare weight, and are gravimetrically stable. Ideally suited for multiple NIOSH analytical methods including silica monitoring.	Vinyl/acrylic copolymer membrane has excellent chemical resistance. Low moisture pickup provides gravimetric stability. Transmission through the infrared range makes this membrane ideal for direct analysis of silica in airborne particulate matter.
Filter Media	Polyvinyl chloride (PVC)	Vinyl/acrylic copolymer
Pore Size	5 µm	0.45 and 0.8 µm
Typical Filter Thickness	0.8 µm: 152 µm (6.0 mils)	0.45 µm: 114 µm (4.5 mils)
Typical Filter Weight	N/A	3 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	99.94%	N/A
Typical Air Flow Rate	53 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	L/min/cm2 at 0.9 bar (90 kPa, 13.5 psi) 0.45 µm: 30 0.8 µm: 47
Typical Water Flow Rate	N/A	mL/min/cm2 at 0.9 bar (90 kPa, 13.5 psi) 0.45 µm: 44 0.8 µm: 108
Maximum Operating Temperature	Water 52 °C (125 °F)	Water 66 °C (151 °F)

Devices for Nuisance Dust Testing

• 37 mm Air Monitoring Cassettes and 37 mm Support Pads

Membranes for PM 10, PM 2.5 Testing

Media	A/E Glass Fiber	Zefluor™
Description	Binder-free borosilicate glass fiber is recommended by EPA for high-volume air sampling to collect atmospheric particles and aerosols.	Low chemical background for highly sensitive determinations. Suited for monitoring acid rain, poly-nuclear aromatic hydrocarbons, and particulate. 0.5 µm pore size meets new NIOSH specifications.
Filter Media	Borosilicate glass without binder	PTFE with PTFE support
Pore Size	1 µm (nominal)	0.5, 1, 2, and 3 µm
Typical Filter Thickness	330 µm (13 mils)	0.5 µm: 178 µm (7 mils) 1 µm: 165 µm (6.5 mils) 2 and 3 µm: 152 µm (6 mils)
Typical Filter Weight	N/A	N/A
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	99.98%	0.5, 1, and 2 µm: 99.99% 3 µm: 99.98%
Typical Air Flow Rate	60 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	L/min/cm2 at 0.7 bar (70 kPa, 10 psi) 0.5 µm: 1 1 µm: 14.6 2 µm: 25.3 3 µm: 53
Typical Water Flow Rate	250 mL/min/cm2 at 0.3 bar (30 kPa, 5 psi)	N/A
Maximum Operating Temperature	Air 550 °C (1022 °F)	N/A

Media	Pallflex Tissuquartz™	Teflo
Description	Binder-free pure quartz offers superior chemical purity. High flow rate and filtration efficiency. Uniquely designed for air monitoring in high temperatures and aggressive atmospheres.	PTFE with unique polymethylpentene (PMP) support ring for PM-10 dichotomous, PM-2.5, and other air sampling techniques. Offers increased durability and low chemical background for X-ray fluorescence, radiometric or gravimetric techniques of elemental analysis.
Filter Media	Pure quartz, no binder	PTFE with PMP (polymethylpentene) support ring
Pore Size	N/A	N/A
Typical Filter Thickness	432 µm (17 mils)	1 µm: 76 µm (3 mils) 2 µm: 46 µm (1.8 mils) 3 µm: 30.4 µm (1.2 mils)
Typical Filter Weight	5.8 mg/cm2	N/A
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	99.90%	1 and 2 µm: 99.99% 3 µm: 99.79%
Typical Air Flow Rate	73 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	L/min/cm2 at 0.7 bar (70 kPa, 10 psi) 1 µm: 17 2 µm: 53 3 µm: 90
Typical Water Flow Rate	220 mL/min/cm2 at 0.35 bar (35 kPa, 5 psi)	N/A
Maximum Operating Temperature	Air 1093 ºC (2000 ºF)	N/A

Devices for PM 10, PM 2.5 Testing

• Analyslide® Petri Dish

Membranes for Silica Testing

Media	GLA-5000	GN-4 Metricel®	DM Metricel®
Description	5 µm polyvinyl chloride (PVC) filters feature low ash, low moisture pickup, light tare weight, and are gravimetrically stable. Ideally suited for multiple NIOSH analytical methods including silica monitoring.	GN-4 (0.8 µm) Metricel membranes are mixed cellulose esters that dissolve completely using standard digestion procedures. These membranes clear completely, possess low artifacts, and offer minimal interference in fiber counting.	Vinyl/acrylic copolymer membrane has excellent chemical resistance. Low moisture pickup provides gravimetric stability. Transmission through the infrared range makes this membrane ideal for direct analysis of silica in airborne particulate matter.
Filter Media	Polyvinyl chloride (PVC)	Hydrophilic mixed cellulose esters	Vinyl/acrylic copolymer
Pore Size	5 µm	0.8 µm	0.45 and 0.8 µm
Typical Filter Thickness	0.8 µm: 152 µm (6.0 mils)	152 µm (6 mils)	0.45 µm: 114 µm (4.5 mils)
Typical Filter Weight	N/A	4 mg/cm2	3 mg/cm2
Typical Aerosol Retention (Following ASTM D 2986-95A, 0.3 µm DOP at 32 L/min/100 cm2 filter media)	99.94%	N/A	N/A
Typical Air Flow Rate	53 L/min/cm2 at 0.7 bar (70 kPa, 10 psi)	55 L/min/3.7 cm2 at 0.9 bar (90 kPa, 13.5 psi)	L/min/cm2 at 0.9 bar (90 kPa, 13.5 psi) 0.45 µm: 30 0.8 µm: 47
Typical Water Flow Rate	N/A	129 mL/min/cm2 at 0.7 bar (70 kPa, 10 psi)	mL/min/cm2 at 0.9 bar (90 kPa, 13.5 psi) 0.45 µm: 44 0.8 µm: 108
Maximum Operating Temperature	Water 52 °C (125 °F)	Water 74 °C (165 °F)	Water 66 °C (151 °F)

Devices for Silica Testing

• 37 mm Air Monitoring Cassettes and 37 mm Support Pads
• Analyslide® Petri Dish