RT Journal Article
T1 Alternative sorptive extraction method for gas chromatography determination of halogenated anisoles in water and wine samples
A1 Montes Goyanes, Rosa
A1 Rodríguez Pereiro, Isaac
A1 Rubí Cano, Elisa
A1 Bollaín Rodríguez, María Herminia
A1 Cela Torrijos, Rafael
K1 Anisoles
K1 Polydimethylsiloxane
K1 Sorptive extraction
K1 Gas chromatography
AB An alternative sorptive microextraction method for the determination of five halogenated anisoles in water and wine matrices is proposed. Analytes were concentrated in an inexpensive and disposable piece of bulk polydimethylsiloxane (PDMS), desorbed with a small volume of organic solvent, and determined by gas chromatography with electron-capture detection (GC-ECD) or tandem mass spectrometry (GC-MS/MS). The influence of several factors on the efficiency of extraction and desorption steps was investigated in detail and the observed behaviour justified on the basis of thermodynamics and kinetics of the solid-phase microextraction technique. Under optimised conditions, analytes were first extracted in the headspace (HS) mode, at room temperature, for 2.5 hours and then desorbed with 1 mL of n-pentane. This extract was further evaporated to 50 L. The overall extraction yield of the procedure ranged from 40 to 55% and the limits of quantification remained between 0.5 and 20 ng L-1, depending on the compound considered and the detection technique. Precision and linearity of the method were excellent for all species with both GC-ECD and GC-MS/MS detection. Matrix effects were evaluated with different water and wine samples; moreover, the suitability of the PDMS sorbent for storage of analytes, under different conditions, was demonstrated.
PB Elsevier
YR 2007
FD 2007-08-02
LK http://hdl.handle.net/10347/31948
UL http://hdl.handle.net/10347/31948
LA eng
NO R. Montes, I. Rodríguez, E. Rubí, M.H. Bollaín, R. Cela, Alternative sorptive extraction method for gas chromatography determination of halogenated anisoles in water and wine samples, Analytica Chimica Acta, Volume 599, Issue 1, 2007, Pages 84-91
NO Financial support from Spanish Government, Xunta de Galicia and E.U. FEDER funds (projects DGICT CTQ2006-03334/BQU and PGIDIT06RAG50501PR-2) are acknowledged. R.M. acknowledges a FPU grant from the Spanish Ministry of Education.
DS Minerva
RD 23 abr 2026