• Home
  • Search Results
  • A two-column method for long-term monitoring of non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (o-VOCs).

A two-column method for long-term monitoring of non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (o-VOCs).

Journal of environmental monitoring : JEM (2003-03-07)
James R Hopkins, Alastair C Lewis, Katie A Read
ABSTRACT

A method has been developed for concurrent analysis of C2-C7 hydrocarbons and C2-C5 oxygenated volatile organic compounds (o-VOCs) including alcohols, aldehydes, ketones and ethers. A multi-bed, Peltier-cooled adsorbent trap, consisting of Carboxen 1000 and Carbopack B, was used to acquire one sample per hour. Upon injection the sample was split in an approximately 50:50 ratio between a 50 m aluminium oxide (Al2O3) porous layer open tubular (PLOT) column and a 10 m LOWOX column. Eluents from each column were then analysed using flame ionisation detection (FID). Regular calibration of the system was performed using a standard cylinder mixture at the parts per billion by volume (ppbV) level for non-methane hydrocarbons (NMHCs) and a permeation tube method for the oxygenated species. The system is fully automated with NMHC detection limits between 1 and 10 parts per trillion by volume (pptV) and o-VOC detection limits between 10 and 40 pptV.

MATERIALS
Product Number
Brand
Product Description

Supelco
Tenax® TA / Carboxen® 1018, glass TD tube, preconditioned, O.D. × L 1/4  in. × 3 1/2  in., Sealed with (Swagelok® End-Fittings), pkg of 10 ea
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Supelco
Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
Supelco
ORBO 78 HBr on Carboxen® 564 specially cleaned (20/45), 400/200 mg, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
Supelco
ORBO 90 Carboxen® 564 (20/45), 160/80 mg, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)
Supelco
Carbopack Adsorbent, matrix Carbopack B, 60-80 mesh, bottle of 10 g
Supelco
Carbopack Adsorbent, matrix Carbopack C, 80-100 mesh, bottle of 10 g
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Supelco
Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 500 g
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Supelco
Carbopack Adsorbent, matrix Carbopack C, 60-80 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1003, 40-60 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
Supelco
Carbopack Adsorbent, matrix Carbopack Z, 60-80 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 563, 20-45 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, bottle of 10 g
Supelco
Carboxen® 1000 Reversible SPE Tube, 200 mg/mL, pk 30
Supelco
Carboxen® 572 for Tobacco Smoke, Adsorbent Bed Wt: (300 mg), cartridge volume 3 mL, pkg of 10 ea
Supelco
ORBO-93 Sorbent Tube, matrix Carboxen® 1000, ORBO tube I.D. × L 6 mm × 95 mm, Bed B 90 mg, Bed A 180 mg, 60/80 mesh, pkg of 25 ea
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm (CAR/PDMS), for use with manual holder, needle size 24 ga
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
Supelco
Carboxen® 569, O.D. × L 1/4  in. × 3 1/2 , glass TD tube, fritted, Sealed with Brass Endcaps, preconditioned, pkg of 10 ea
Supelco
Carboxen® 572 for Tobacco Smoke, Adsorbent Bed Wt: 300 mg, cartridge size 3 mL, pkg of 50 ea
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm (CAR/PDMS), needle size 23 ga, for use with manual holder
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with manual holder/autosampler
Supelco
Carboxen® 569, glass TD tube, fritted, O.D. × L 1/4  in. × 3 1/2  in., preconditioned, pkg of 10 ea
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, pack of 144 × 290 mg
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm (CAR/PDMS), needle size 24 ga, for use with autosampler