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Automated trace determination of earthy-musty odorous compounds in water samples by on-line purge-and-trap–gas chromatography–mass spectrometry

AuthorsSalemi, Amir; Lacorte Bruguera, Silvia; Bagheri, Habib; Barceló, Damià
Solvent-free extraction
Water odorants
Gas chromatography–mass spectrometry
Issue Date20-Oct-2006
CitationJournal of Chromatography A 1136(2): 170-175 (2006)
AbstractAn automated technique based on purge-and-trap coupled to gas chromatography with mass spectrometric detection has been developed and optimized for the trace determination of five of the most important water odorants; 2-isopropyl-3-methoxypyrazine, 2-isobutyl-3-methoxypyrazine, 2-methylisoborneol, 2,4,6-trichloroanisole and geosmin. The extraction method was absolutely solvent-free. Analytes were purged from 20 ml of water sample containing sodium chloride at room temperature by a flow of He and trapped on a Tenax sorbent. The desorption step was performed with helium and temperature programming and desorbed analytes were directly transferred to a gas chromatograph coupled to a mass spectrometer for separation and determination. The method was reproducible (RSD < 8%) and linear over the calibration range (10–200 ng l−1). The relative recoveries of the analytes from ground water sample were calculated and were between 80 and 103% and limits of detection (LOD) below odor thresholds were achieved for most of the compounds.
Description6 pages, 4 figures, 3 tables.-- PMID: 17055519 [PubMed].-- Printed version published Dec 15, 2006.
Publisher version (URL)http://dx.doi.org/10.1016/j.chroma.2006.09.087
Appears in Collections:(IDAEA) Artículos
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