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  • Multisorbent tubes for collecting volatile organic compounds in spacecraft air.

Multisorbent tubes for collecting volatile organic compounds in spacecraft air.

AIHAJ : a journal for the science of occupational and environmental health and safety (2000-04-20)
M L Matney, S W Beck, T F Limero, J T James
ABSTRACT

The sampling capability of Tenax-TA tubes, used in the National Aeronautics and Space Administration's solid sorbent air sampler to trap and concentrate contaminants from air aboard spacecraft, was improved by incorporating two sorbents within the tubes. Existing tubes containing only Tenax-TA allowed highly volatile compounds to "break through" during collection of a 1.5 L air sample. First the carbon molecular sieve-type sorbents Carboxen 569 and Carbosieve S-III were tested for their ability to quantitatively trap the highly volatile compounds. Breakthrough volumes were determined with the direct method, whereby low ppm levels of methanol or Freon 12 in nitrogen were flowed through the sorbent tubes at 30 mL/min, and breakthrough was detected by gas chromatography. Breakthrough volumes for methanol were about 9 L/g on Carboxen 569 and 11 L/g on Carbosieve S-III; breakthrough volumes for Freon 12 were about 7 L/g on Carboxen 569 and > 26 L/g on Carbosieve S-III. Next, dual-bed tubes containing either Tenax-TA/Carbosieve S-III, Tenax-TA/Carboxen 569, or Carbotrap/Carboxen 569 to a 10-component gas mixture were exposed, in dry and in humidified air (50% relative humidity), and percentage recoveries of each compound were determined. The Tenax-TA/Carboxen 569 combination gave the best overall recoveries (75-114% for the 10 compounds). Acetaldehyde had the lowest recovery (75%) of the 10 compounds, but this value was still an improvement over either the other two sorbent combinations or the original single-sorbent tubes.

MATERIALS
Product Number
Brand
Product Description

Supelco
Carbotrap® 300, stainless steel TD tube, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carbotrap® 349, glass TD tube, fritted, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, pack of 144 × 290 mg
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carbotrap® 300, glass TD tube, fritted, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
Pricing and availability is not currently available. Contact Technical Service
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carbotrap® 300, stainless steel TD tube, O.D. × I.D. × L 1/4 in. × 5 mm × 7 in., preconditioned, pkg of 1 ea
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1003, 40-60 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® X, 20-40 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 563, 20-45 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® C, 20-40 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® B, 20-40 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service
Supelco
Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
Pricing and availability is not currently available. Contact Technical Service