کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10548165 965428 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of odour-causing volatile organic compounds in cork stoppers by multiple headspace solid-phase microextraction
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Determination of odour-causing volatile organic compounds in cork stoppers by multiple headspace solid-phase microextraction
چکیده انگلیسی
Multiple headspace solid-phase microextraction (MHS-SPME) coupled with gas chromatography-mass spectrometry has been applied in order to determine 2,4,6-trichloroanisole (2,4,6-TCA), guaiacol, 1-octen-3-ol and 1-octen-3-one in three samples of cork stoppers. These compounds are responsible for cork taint in wine and can modify the organoleptic properties of bottled wine. Variables such as temperature, addition of water, extraction time, and amount of cork were studied. The extractions were performed with a 50/30 μm divinylbenzene-carboxen-polydimethylsiloxane (DVB-CAR-PDMS) fibre for 45 min at 100 °C using 20 mg of cork. For calibration, 50 μL of VOC aqueous solutions were used and the extraction were carried out for 45 min at 75 °C. The limits of detection of the method expressed as ng of VOC per g of cork were 0.3 for 2,4,6-TCA, 7.5 for guaiacol, 1.7 for 1-octen-3-one and 1.9 for 1-octen-3-ol. Relative standard deviation of replicate samples was less than 10%. Significant losses of analytes were observed when the samples were ground at room temperature. Finally, a recovery study was performed and the MHS-SPME results were validated using Soxhlet extraction results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1068, Issue 2, 18 March 2005, Pages 201-208
نویسندگان
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