Analysis of anisoles in wines using pervaporation coupled to gas chromatography-mass spectrometry.
Two procedures for the determination of 2,4,6-trichloroanisole, 2,6-dichloroanisole and 2,4,6-tribromoanisole in tainted wines have been developed. Both methods are based on pervaporation (PV) of the analytes and final determination by gas chromatography-ion-trap tandem mass spectrometry (GC-MS). In the Approach A, pervaporation was directly coupled to the GC-MS system (PV-GC-MS/MS) and in Approach B a solid-phase cryogenic trap-thermal desorption (CT-TD) device was connected to the pervaporator (PV-CT-TD-GC-MS/MS). Results show that last coupling present better sensitivity as well as precision. Detection limits (DLs) for 2,4,6-trichloroanisole were estimated to be 25.8 and 4.2 ng l(-1) for Approaches A and B, respectively, when 10 ml of sample was analysed. Linear range of the calibration curves ranged from quantification limit to 15 ng for PV-GC-MS/MS and from quantification limit to 2 ng for PV-CT-TD-GC-MS/MS. Due to the low threshold odour concentration of these compounds in wine, Approach B is proposed as a reliable method for analytical quality control of this product.
Gómez-Ariza
J L
JL
Departamento de Química y Ciencia de los Materiales, Facultad de Ciencias Experimentales, Universidad de Huelva, Campus de El Carmen, 21007-Huelva, Spain. ariza@uhu.es
García-Barrera
T
T
Lorenzo
F
F
D000840:Anisoles / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006371:Helium; D007202:Indicators and Reagents; D011786:Quality Control; D012015:Reference Standards; D015203:Reproducibility of Results; D014920:Wine / Q000032:analysis*
D000840:Anisoles; D007202:Indicators and Reagents; D006371:Helium