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Determination of Odorous Mixed Chloro-bromoanisoles in Water by Solid-phase Micro-extraction and Gas Chromatography–mass Detection by Alfredo Díaz; Francesc Ventura; Ma. Teresa Galceran is a Chemistry article available to read on EtoBox.

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A headspace-solid-phase micro-extraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) method has been proposed for the simultaneous determination of odorous trihalogenated anisoles in water. Parameters affecting efficiency of HS-SPME procedure, such as the selection of the SPME coating, extraction time, temperature and ionic strength were optimized. The commercially available polydimethylsiloxane (PDMS 100 m) fiber appears to be the most suitable for the simultaneous determination of these compounds. Runto-run precision with relative standard deviations (R.S.D.s) between 5 and 15% were obtained for most of the compounds except for 2,5dicloro-6-bromo-anisole, 2,3-dibromo-6-chloroanisole, pentachloro-and pentabromoanisole (>20%). The method was linear over two orders of magnitude, and detection limits were compound dependent and ranged from 0.03 ng/L for 2,4,6-trichloroanisole to 0.25 ng/L for 2,3dibromo-6-chloroanisole. The HS-SPME-GC-MS procedure was tested using real samples and relatively good standard deviations were obtained when using p-iodoanisole as internal standard for quantification. This is the first time that the individual identification of odorous trihal

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Author

Alfredo Díaz; Francesc Ventura; Ma. Teresa Galceran

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)