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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

Salemi, A ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1016/j.chroma.2006.09.087
  3. Publisher: 2006
  4. Abstract:
  5. An 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. © 2006 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Desorption ; Mass spectrometry ; Odor control ; Purging ; Solvent extraction ; Water ; Limits of detection (LOD) ; Purge-and-trap ; Solvent-free extraction ; Water odorants ; Gas chromatography ; 2 isobutyl 3 methoxypyrazine ; 2 isopropyl 3 methoxypyrazine ; 2 methylisoborneol ; 2,4,6 trichloroanisole ; Anisole derivative ; Geosmin ; Helium ; Pyrazine derivative ; Solvent ; Unclassified drug ; Calculation ; Calibration ; Chemical analysis ; Chemical procedures ; Extraction ; Mass spectrometer ; Priority journal ; Reproducibility ; Room temperature ; separation technique ; Anisoles ; Automation ; Bornanes ; Gas Chromatography-Mass Spectrometry ; Naphthols ; Odors ; Online Systems ; Pyrazines ; Sensitivity and Specificity
  8. Source: Journal of Chromatography A ; Volume 1136, Issue 2 , 2006 , Pages 170-175 ; 00219673 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0021967306018577