| Title: | A two-column method for long-term monitoring of non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (o-VOCs) |
| Author(s): | Hopkins JR; Lewis AC; Read KA; |
| Address: | "School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, West Yorkshire, UK LS2 9JT" |
| ISSN/ISBN: | 1464-0325 (Print) 1464-0325 (Linking) |
| 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" |
| Keywords: | "Absorption Air Pollutants/*analysis Alcohols/*analysis Aldehydes/*analysis Calibration Chemistry Techniques, Analytical/methods Environmental Monitoring/*methods Ethers/*analysis Hydrocarbons/*analysis Ketones/*analysis Oxygen/analysis/chemistry Volatiliz;" |
| Notes: | "MedlineHopkins, James R Lewis, Alastair C Read, Katie A eng England 2003/03/07 J Environ Monit. 2003 Feb; 5(1):8-13. doi: 10.1039/b202798d" |
