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J Chromatogr A

Title:		Online in situ analysis of selected semi-volatile organic compounds in water by automated microscale solid-phase extraction with large-volume injection/gas chromatography/mass spectrometry
Author(s):		Li Y; George JE; McCarty CL;
Address:		"Underwriters Laboratories Inc., 110 South Hill Street, South Bend, IN 46617, USA. Yongtao.Li@us.ul.com"
Journal Title:		J Chromatogr A
Year:		2007
Volume:		20071024
Issue:		1-Feb
Page Number:		223 - 230
DOI:		10.1016/j.chroma.2007.10.054
ISSN/ISBN:		0021-9673 (Print) 0021-9673 (Linking)
Abstract:		"A fully automated analytical method was developed for the online in situ analysis of selected semi-volatile organic compounds in water. The method used a large-volume injection/gas chromatography/mass spectrometry coupled with a fully automated microscale solid-phase extraction technique, which was based on x-y-z robotic techniques. Water samples were extracted by using a 96-well solid-phase extraction plate. For most analytes included in this study, the obtained linear calibrations ranged from 0.05 to 5.0 microg/L with correlation coefficients of 0.996-1.000, the method detection limits were less than 0.1 microg/L, and the relative recoveries were in the range of 70-120% with a relative standard deviation of less than 15% for fortified reagent water samples. The applications to chlorinated tap water, well water, and river water have been validated. The obtained results were similar to those resulting from fortified reagent water samples for all analytes except metribuzin, bromacil, aldrin, and methoxychlor. Matrix effects were observed for these analytes. In general, this fully automated analytical method was rugged, reliable, and easy to operate, and was capable of providing real-time data to water treatment and distribution systems as well as water reservation and protection systems. In addition, the method could reduce the analytical costs associated with sample collection, transportation, storage, and preparation"
Keywords:		Automation Gas Chromatography-Mass Spectrometry/*methods Organic Chemicals/*analysis Robotics Sensitivity and Specificity Volatilization Water/*chemistry;
Notes:		"MedlineLi, Yongtao George, John E McCarty, Christina L eng Netherlands 2007/11/27 J Chromatogr A. 2007 Dec 28; 1176(1-2):223-30. doi: 10.1016/j.chroma.2007.10.054. Epub 2007 Oct 24"