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首页> 外文期刊>Phytochemical Analysis >Comprehensive two-dimensional gas chromatography-mass spectrometry analysis of volatile constituents in Thai vetiver root oils obtained by using different extraction methods
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Comprehensive two-dimensional gas chromatography-mass spectrometry analysis of volatile constituents in Thai vetiver root oils obtained by using different extraction methods

机译：采用不同提取方法获得的泰国香根菜根油中挥发性成分的二维气相色谱-质谱综合分析

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Introduction - Vetiver root oil is known as one of the finest fixatives used in perfumery. This highly complex oil contains more than 200 components, which are mainly sesquiterpene hydrocarbons and their oxygenated derivatives. Since conventional GC-MS has limitation in terms of separation efficiency, the comprehensive two-dimensional GC-MS (GC x GC-MS) was proposed in this study as an alternative technique for the analysis of vetiver oil constituents.Objective - To evaluate efficiency of the hyphenated GC x GC-MS technique in terms of separation power and sensitivity prior to identification and quantitation of the volatile constituents in a variety of vetiver root oil samples.Methodology - Dried roots of Vetiveria zizanioides were subjected to extraction using various conditions of four different methods; simultaneous steam distillation, supercritical fluid, microwave-assisted, and Soxhlet extraction. Volatile components in all vetiver root oil samples were separated and identified by GC-MS and GC x GC-MS. The relative contents of volatile constituents in each vetiver oil sample were calculated using the peak volume normalization method.Results - Different techniques of extraction had diverse effects on yield, physical and chemical properties of the vetiver root oils obtained. Overall, 64 volatile constituents were identified by GC-MS. Among the 245 well-resolved individual components obtained by GC x GC-MS, the additional identification of 43 more volatiles was achieved.Conclusion - In comparison with GC-MS, GC x GC-MS showed greater ability to differentiate the quality of essential oils obtained from diverse extraction conditions in terms of their volatile compositions and contents. Copyright pb 2009 John Wiley & Sons, Ltd.
机译：简介-香根草根油是香水中使用的最好的固定剂之一。这种高度复杂的油包含200多种成分，主要是倍半萜碳氢化合物及其氧化衍生物。由于常规GC-MS在分离效率方面存在局限性，因此在本研究中提出了全面的二维GC-MS（GC x GC-MS）作为分析香根草油成分的替代技术。在鉴定和定量各种香根草油样品中的挥发性成分之前，采用联用GC x GC-MS技术对分离力和灵敏度进行了分析。方法-用四种条件在不同条件下提取香根草干根不同的方法;同时进行蒸汽蒸馏，超临界流体，微波辅助和索氏萃取。分离出所有香根草根油样品中的挥发性成分，并通过GC-MS和GC x GC-MS进行鉴定。使用峰体积归一化方法计算每个香根草油样品中挥发性成分的相对含量。结果-不同的提取方法对所得香根草根油的产量，理化性质产生不同影响。总体上，通过GC-MS鉴定出64种挥发性成分。在GC x GC-MS获得的245种分离度高的成分中，另外鉴定出43种挥发物。结论-与GC-MS相比，GC x GC-MS显示出更高的分辨精油质量的能力从其挥发性成分和含量的不同提取条件中获得。版权所有pb 2009 John Wiley＆Sons，Ltd.

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