Determination of volatile organic compounds in water by headspace solid-phase microextraction gas chromatography coupled to tandem mass spectrometry with triple quadrupole analyzer
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Other documents of the author: Cervera Vidal, María Inés; Beltran Arandes, Joaquin; Lopez, Francisco; Hernandez, Felix
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comunitat-uji-handle2:10234/33596
comunitat-uji-handle3:10234/33597
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http://dx.doi.org/10.1016/j.aca.2011.08.012 |
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Title
Determination of volatile organic compounds in water by headspace solid-phase microextraction gas chromatography coupled to tandem mass spectrometry with triple quadrupole analyzerDate
2011-10-17Publisher
ElsevierISSN
0003-2670Bibliographic citation
Analytica Chimica Acta (17 Oct. 2011), vol. 704, no. 1/2, 87–97Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S000326701101110X#Subject
Abstract
In the present work, a rapid method with little sample handling has been developed for determination of 23 selected volatile organic compounds in environmental and wastewater samples. The method is based on headspace ... [+]
In the present work, a rapid method with little sample handling has been developed for determination of 23 selected volatile organic compounds in environmental and wastewater samples. The method is based on headspace solid-phase microextraction (SPME) followed by gas chromatography coupled to tandem mass spectrometry (GC–MS/MS) determination using triple quadrupole analyzer (QqQ) in electron ionization mode. The best conditions for extraction were optimised with a factorial design taking into account the interaction between different parameters and not only individual effects of variables. In the optimized procedure, 4 mL of water sample were extracted using a 10 mL vial and adding 0.4 g NaCl (final NaCl content of 10%). An SPME extraction with carboxen/polydimethylsiloxane 75 μm fiber for 30 min at 50 °C (with 5 min of previous equilibration time) with magnetic stirring was applied. Chromatographic determination was carried out by GC–MS/MS working in Selected Reaction Monitoring (SRM) mode. For most analytes, two MS/MS transitions were acquired, although for a few compounds it was difficult to obtain characteristic abundant fragments. In those cases, a pseudo selected reaction monitoring (pseudo-SRM) with three ions was used instead. The intensity ratio between quantitation (Q) and confirmation (q) signals was used as a confirmatory parameter.
The method was validated by means of recovery experiments (n = 6) spiking mineral water samples at three concentration levels (0.1, 5 and 50 μg L−1). Recoveries between 70% and 120% were generally obtained with relative standard deviations (RSDs) lower than 20%.
The developed method was applied to surface water and wastewater from a wastewater treatment plant and from a municipal solid-waste treatment plant. Several compounds, like chloroform, benzene, trichloroethylene, toluene, tetrachloroethylene, dibromochloromethane, xylenes and bromoform were detected and confirmed in all the samples analyzed [-]
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