| Title: | [Measurement method research on trace volatile organic compounds in atmosphere] |
| Author(s): | Wang YS; Sun Y; Xu X; Xiu TY; Wang YH; |
| Address: | "Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. wys@dq.cern.ac.cn" |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "An automated accumulation sampling system and a method of two-step Cryo-Concentrated System combined with Gas Chromatography/Mass Spectrometry (CCS-GC/MS) are introduced. The method is evaluated by a set of special experiments and the results are demonstrated. The lowest limit volume concentrations of the measurement is expanded from 10 (-6) to 10(-12) using CCS-GC/ MS instead of the normal method of GC/MS and the average response factor of 39 object compounds is 2.9 x 10(-12) x A(-1). When injection volume of air sample reaches 1000 cm3, the lowest limit is 7 x 10(-12) - 40 x 10(-12); CCS-GC/MS may identify all the objective chemical species in the atmosphere samples, with average 2.5s bias of retention time for 39 GC peaks. Within 0 - 400 x 10(-9), the concentration of all the objective compounds can be calculated by standard curve individually (average r2 above 0.99) and accurately. The recollect rate is 88% - 111%, at average of 100.8% +/- 5.6%; and the bias of precision is 2% - 14%, at average of 6.6%" |
| Keywords: | Air Pollutants/*analysis Atmosphere/*analysis Environmental Monitoring/*methods Gas Chromatography-Mass Spectrometry Organic Chemicals/*analysis Volatilization; |
| Notes: | "MedlineWang, Yue-Si Sun, Yang Xu, Xin Xiu, Tian-Yang Wang, Ying-Hong chi English Abstract Research Support, Non-U.S. Gov't China 2005/10/11 Huan Jing Ke Xue. 2005 Jul; 26(4):18-23" |
