Title of article :
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/Authors :
Li، نويسنده , , Yongtao and George، نويسنده , , John E. and McCarty، نويسنده , , Christina L.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
8
From page :
223
To page :
230
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 μg/L with correlation coefficients of 0.996–1.000, the method detection limits were less than 0.1 μg/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 :
Large-volume injection , GC/MS , Automated solid-phase extraction , Semi-volatile organic compounds , Water analysis , Online in situ analysis
Journal title :
Journal of Chromatography A
Serial Year :
2007
Journal title :
Journal of Chromatography A
Record number :
1522756
Link To Document :
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