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

James R. Hopkins, Alastair C. Lewis, Katie A. Read
2002 Journal of Environmental Monitoring  
A method has been developed for concurrent analysis of C 2 -C 7 hydrocarbons and C 2 -C 5 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 (Al 2 O 3 ) porous layer open tubular (PLOT) column and a 10 m LOWOX column.
more » ... 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.
doi:10.1039/b202798d pmid:12619750 fatcat:ntewjcpvprahra4b64nh5ydxle