A headspace (HS) solid‐phase extraction (SPE) based on polydimethylsiloxane (PDMS)/ionic liquid (IL) sponge was developed for the extraction of lavender essential oil. The PDMS after loading of 1‐butyl‐3‐methylimidazolium tetrachloroferrate ([BMIM]FeCl₄) with a high surface area and excellent adsorption capacity was successfully applied in the SPE process. Microwave distillation (MD) coupled with HS‐PDMS/[BMIM]FeCl₄ extraction after GC–MS was proposed. Various experimental parameters were studied. The optimal conditions were as follows: optimal IL, [BMIM]FeCl₄; volume ratio of IL to ethanol, 1:5; extraction solvent, n‐hexane; microwave power, 600 W; and irradiation time, 12 min. The limits of detection and quantification of the analytic compounds were in the ranges 4.00–16.32 and 10.00–40.00 ng, respectively. The intra‐day and inter‐day precisions were in the ranges 0.37–1.94% and 1.20–2.45%, respectively. Under the optimized conditions, 13 samples of 3 lavender varieties were analyzed, and 40 compounds were identified. Lavender varieties were distinguished using principal component analysis. The results showed that MD‐HS‐PDMS/IL‐GC–MS is a novel, simple, and sensitive method for the determination of essential oil in complex plant samples.

中文翻译：

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顶空固相萃取中使用的聚二甲基硅氧烷/离子液体海绵与GC-MS结合使用，可快速分析薰衣草中的精油

开发了基于聚二甲基硅氧烷（PDMS）/离子液体（IL）海绵的顶空（HS）固相萃取（SPE），用于萃取薰衣草精油。具有高表面积和优异吸附能力的1-丁基-3-甲基咪唑四氯高铁酸盐（[BMIM] FeCl ₄）加载后的PDMS成功应用于SPE工艺中。提出了微波蒸馏（GC ）结合HS-PDMS / [BMIM] FeCl ₄萃取的方法。研究了各种实验参数。最佳条件如下：最佳IL，[BMIM] FeCl ₄；IL与乙醇的体积比为1：5；萃取溶剂，n己烷 微波功率600 W; 照射时间12分钟 分析化合物的检出限和定量限分别为4.00–16.32和10.00–40.00 ng。日内和日间精度分别在0.37–1.94％和1.20–2.45％的范围内。在优化条件下，分析了3种薰衣草品种的13个样品，并鉴定了40种化合物。薰衣草品种通过主成分分析进行区分。结果表明，MD-HS-PDMS / IL-GC-MS是测定复杂植物样品中精油的一种新颖，简单而灵敏的方法。