Determination of priority organic micro-pollutants in water by gas chromatography coupled to triple quadrupole mass spectrometry [An article from: Analytica Chimica Acta]
Determination of priority organic micro-pollutants in water by gas chromatography coupled to triple quadrupole mass spectrometry [An article from: Analytica Chimica Acta]
Last Updated on Thursday, 15 September 2011 12:19 Written by Administrator Thursday, 15 September 2011 12:19
Determination of priority organic micro-pollutants in water by gas chromatography coupled to triple quadrupole mass spectrometry [An article from: Analytica Chimica Acta]
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A multiclass method has been developed for screening, quantification and confirmation of organic micro-pollutants in water by gas chromatography coupled to mass spectrometry with a triple quadrupole analyzer. The work has been focused on the determination of more than 50 compounds belonging to different chemical families: 19 organochlorine and organophosphorus insecticides, 6 herbicides, 7 polychlorinated biphenyls, 16 polycyclic aromatics hydrocarbons, 2 brominated diphenyl ethers, and 3 octyl/nonyl phenols and pentachlorobenzene. Most of these analytes are included in the list of priority substances in the framework on European Water Policy. Analyte extraction was performed by solid phase extraction using C”1″8 cartridges, and five isotopically labeled standards were added before extraction as surrogates. Analyses were performed by gas chromatography with tandem mass spectrometry (MS/MS) in electron impact mode. Accuracy and precision were evaluated by means of recovery experiments using water samples fortified at two concentration levels (25 and 250ngL^-^1), with satisfactory results for most of analytes. The excellent selectivity and sensitivity reached in selected reaction monitoring mode allowed us satisfactory quantification and confirmation at levels as low as 25ngL^-^1. Two MS/MS transitions were acquired for each analyte, using the Q/q intensity ratio as a confirmatory parameter. The method developed was applied to the analysis of surface, ground and wastewater samples collected from the Valencia Region (Spain). Analytical methodology using negative chemical ionization mode was also validated for the organochlorine compounds selected, showing a superior sensitivity and lower detection limits.
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Tags: Acta, Analytica, article, Chimica, CHROMATOGRAPHY, Coupled, Determination, From, Mass, micropollutants, Organic, Priority, quadrupole, Spectrometry, TRIPLE, water
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