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J Chromatogr A

Title:		Direct screening and confirmation of priority volatile organic pollutants in drinking water
Author(s):		Caro J; Serrano A; Gallego M;
Address:		"Department of Analytical Chemistry, Campus of Rabanales, University of Cordoba, E-14071 Cordoba, Spain"
Journal Title:		J Chromatogr A
Year:		2007
Volume:		20061107
Issue:		1-Feb
Page Number:		244 - 250
DOI:		10.1016/j.chroma.2006.10.054
ISSN/ISBN:		0021-9673 (Print) 0021-9673 (Linking)
Abstract:		"A screening tool was proposed for the rapid detection of eight priority volatile organic pollutants according to European standards in drinking water. The method is based on the direct coupling of a headspace sampler with a mass spectrometer, using a chromatographic column heated to 175 degrees C as an interface. The water sample was subjected to the headspace extraction process and the volatile fraction was introduced directly into the mass spectrometer, without prior chromatographic separation, achieving low detection limits (0.6-1.2 ng/ml) for all compounds. The mass spectrum resulting from the simultaneous ionization and fragmentation of the mixture of molecules constitutes the volatile profile of each sample. An appropriate chemometric treatment of these signals permitted them to be classified, on the basis of their volatile composition, as contaminated or uncontaminated with respect to the legally established concentration levels for these compounds in drinking water, and providing no false negatives. A conventional confirmation method was carried out to analyze positive water samples by using the same instrumental setup as in the screening method, but using an appropriate temperature program in the chromatographic column to separate, identify and quantify each analyte"
Keywords:		"Gas Chromatography-Mass Spectrometry/methods Hazardous Substances/*analysis Organic Chemicals/analysis/chemistry Volatilization Water Pollutants, Chemical/*analysis/chemistry Water Supply/*analysis/standards;"
Notes:		"MedlineCaro, J Serrano, A Gallego, M eng Research Support, Non-U.S. Gov't Netherlands 2006/11/10 J Chromatogr A. 2007 Jan 5; 1138(1-2):244-50. doi: 10.1016/j.chroma.2006.10.054. Epub 2006 Nov 7"