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Headspace solid-phase microextraction for the determination of volatile organic sulphur and selenium compounds in beers, wines and spirits using gas chromatography and atomic emission detection

pharmacy 添加于 2009-9-5 05:28 | 2182 次阅读 | 0 个评论

作者
Campillo N, Peñalver R, López-García I, Hernández-Córdoba M
摘要
A rapid and solvent-free method for the determination of eight volatile organic sulphur and two selenium compounds in different beverage samples using headspace solid-phase microextraction and gas chromatography with atomic emission detection has been developed. The bonded carboxen/polydimethylsiloxane fiber was the most suitable for preconcentrating the analytes from the headspace of the sample solution. Volumes of 20 mL of undiluted beer were used while, in the case of wines and spirits, sample:water ratios of 5:15 and 2:18, respectively, were used, in order to obtain the maximum sensitivity. Quantitation was carried out by using synthetic matrices of beer and wine, and a spiked sample for spirits, and using ethyl methyl sulphide and isopropyl disulphide as internal standards. Detection limits ranged from 8 ng L −1 to 40 ng mL −1 , depending on the compound and the beverage sample analyzed, with a fiber time exposure of 20 min at ambient temperature. The optimized method was successfully applied to different samples, some of the studied compounds being detected at concentration levels in the 0.04–152 ng mL −1 range.
详细资料
- 文献种类: Journal Article
- 期刊名称: Journal of Chromatography A
- 期刊缩写: Journal of Chromatography A
- 期卷页: 2009年第1216卷第39期 6735-6740页
- ISBN: 0021-9673
学科领域生物医药 » 药学
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