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Talanta

Title:		Process sampling module coupled with purge and trap-GC-FID for in situ auto-monitoring of volatile organic compounds in wastewater
Author(s):		Liu HW; Liu YT; Wu BZ; Nian HC; Chen HJ; Chiu KH; Lo JG;
Address:		"Department of Biomedical Engineering and Environmental Science, National Tsing-Hua University, Hsinchu, Taiwan, ROC"
Journal Title:		Talanta
Year:		2009
Volume:		20090818
Issue:		2
Page Number:		903 - 908
DOI:		10.1016/j.talanta.2009.08.011
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"An automatic sampling device, i.e., process sampling module (PSM), connected with a purge and trap-GC-FID system has been developed for real-time monitoring of VOCs in wastewater. The system was designed to simultaneously monitor 17 compounds, including one polar compound, i.e., acetone, and 16 non-polar compounds. The trapping tube is packed with two adsorbents, Carbopack B and Carbosieve III, to trap target compounds. For the purpose of in situ monitoring, the flush valve of the sampling tube is composed of two two-way valves and a time controller to prevent absorption interference of the residue. The optimal conditions for the analytical system include a 12 min purge time at a temperature of 60 degrees C, and 4 min of desorption time with a desorption temperature of 260 degrees C. Good chromatograms have been obtained with the analytical system even if a cryogenic device and de-misting were not used. The relative standards deviation (RSD) of the system is between 2% and 13.4%, and accuracies between 0.3 and 23.5% have been achieved. The detection limits of the method range from 0.32 to 2.39 ppb. In this system, the four parts, i.e., PSM, P&T, GC, and FID, were simple, reliable and rugged. Also, the interface of these four parts was simple and dependable"
Keywords:		"Acetone/analysis Adsorption Chloroform/analysis Chromatography, Gas/instrumentation/*methods Environmental Monitoring/*methods Reproducibility of Results Toluene/analysis Volatile Organic Compounds/*analysis Water Pollutants, Chemical/*analysis;"
Notes:		"MedlineLiu, Hsin-Wang Liu, Yung-Tsun Wu, Bei-Zen Nian, Hung-Chi Chen, Hsing-Jung Chiu, Kong-Hwa Lo, Jiunn-Guang eng Research Support, Non-U.S. Gov't Netherlands 2009/10/20 Talanta. 2009 Dec 15; 80(2):903-8. doi: 10.1016/j.talanta.2009.08.011. Epub 2009 Aug 18"