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Application of head-space solid-phase microextraction coupled to comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry for the determination of multiple pesticide residues in tea samples
dc.contributor.author | Schurek, J. | |
dc.contributor.author | Portoles, Tania | |
dc.contributor.author | Hajslova, J. | |
dc.contributor.author | Riddellova, K. | |
dc.contributor.author | Hernandez, Felix | |
dc.date.accessioned | 2012-03-30T08:43:54Z | |
dc.date.available | 2012-03-30T08:43:54Z | |
dc.date.issued | 2008 | |
dc.identifier | http://dx.doi.org/10.1016/j.aca.2008.01.007 | |
dc.identifier.citation | Analytica Chimica Acta, 611, 2, p. 163-172 | |
dc.identifier.issn | 32670 | |
dc.identifier.uri | http://hdl.handle.net/10234/34031 | |
dc.description.abstract | A new method has been developed to detect 36 pesticides that may contaminate tea samples (green, black and fruit tea). The hyphenation of solid-phase microextraction in head-space mode with a comprehensive two-dimensional gas chromatography coupled with high-speed time-of-flight mass spectrometry (HS-SPME-GC × GC/TOF MS) proved to be a quick alternative to conventional GC/MS methodology which employs solvent-based extraction. The key parameters for controlling HS-SPME performance were optimized, including fiber coating type, temperature and absorption time settings and tea matrix modification by adding water. Quantification was carried out using matrix-matched calibration. The repeatability of measurements, expressed as relative standard deviation (R.S.D.), was less than 24% for all analytes. The limits of quantification ranged from 1 to 28 μg kg<sup>-1</sup>. The optimized method was applied to analyze real life samples obtained from a retail market. Results generated by the new SPME procedure and those obtained by using a conventional one involving ethyl acetate extraction and high-performance gel permeation chromatography (HPGPC) clean up agreed with each other for positive (containing residue) samples. © 2008 Elsevier B.V. All rights reserved. | |
dc.language.iso | eng | |
dc.rights.uri | http://rightsstatements.org/vocab/CNE/1.0/ | * |
dc.subject | Comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry | |
dc.subject | Pesticides | |
dc.subject | Solid-phase microextraction | |
dc.subject | Tea | |
dc.title | Application of head-space solid-phase microextraction coupled to comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry for the determination of multiple pesticide residues in tea samples | |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | http://dx.doi.org/10.1016/j.aca.2008.01.007 | |
dc.rights.accessRights | info:eu-repo/semantics/closedAccess |
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