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首页> 外文期刊>Journal of the Iranian Chemical Society >Development of dynamic headspace-liquid phase microextraction method performed in a home-made extraction vessel for extraction and preconcentration of 1,4-dioxane from shampoo
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Development of dynamic headspace-liquid phase microextraction method performed in a home-made extraction vessel for extraction and preconcentration of 1,4-dioxane from shampoo

机译：在家用萃取容器中进行动态顶空-液相微萃取方法的开发，用于从洗发剂中萃取和预浓缩1,4-二恶烷

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摘要

In the present study, a new, simple, rapid, and environmentally friendly headspace-liquid phase microextraction method followed by gas chromatography-flame ionization detection has been developed for the extraction/preconcentration and determination of 1,4-dioxane from shampoo. The developed procedure is performed in a home-made extraction vessel, connected to a glass vial containing sample and extraction solvent. In this method, an aliquot weight of shampoo is mixed with a binary mixture of n-hexane and dichloromethane (50:50, v/v) as the extractant and the target analyte is extracted during a liquid-liquid extraction procedure. Then a home-made extraction vessel containing a few microliters of a collection/extraction solvent is contacted to a glass vial containing the organic phase obtained from the previous step. By heating 1,4-dioxane is vaporized and enriched in a mu L volume of the collection/extraction solvent. Then an aliquot volume of the collected phase is injected into the separation system. The effect of several factors which may influence performance of the method, including kind and volume of the extraction solvents used in both steps, extraction temperature, extraction time, and salt addition were evaluated. Under the optimum extraction conditions, limits of detection and quantification for the target analyte were obtained 0.52 and 1.73 mu g kg(-1), respectively. Enrichment factor and extraction recovery were 333 and 89 %, respectively. The method precision was evaluated at a concentration of 25 mu g kg(-1) and relative standard deviation was less than 6.9 % for intra-day (n = 6) and inter-day (n = 4) precisions. Finally, the proposed method has been successfully applied in analysis of 1,4-dioxane in different shampoo samples.
机译：在本研究中，开发了一种新的，简单，快速且环保的顶空-液相微萃取方法，然后进行气相色谱-火焰电离检测，用于从洗发剂中提取/预浓缩和测定1,4-二恶烷。所开发的程序在自制的萃取容器中执行，该容器与装有样品和萃取溶剂的玻璃小瓶相连。在这种方法中，将等份的洗发水与正己烷和二氯甲烷的二元混合物（50：50，v / v）混合，并在液-液萃取过程中萃取目标分析物。然后，将含有几微升收集/萃取溶剂的自制提取容器与含有从前一步骤获得的有机相的玻璃小瓶接触。通过加热，将1，4-二恶烷蒸发并富集在1升体积的收集/提取溶剂中。然后将等分体积的收集相注入分离系统。评估了可能影响该方法性能的几个因素的影响，包括在两个步骤中使用的萃取溶剂的种类和体积，萃取温度，萃取时间和加盐量。在最佳提取条件下，目标分析物的检出限和定量限分别为0.52和1.73μg kg（-1）。富集因子和提取回收率分别为333％和89％。在日间（n = 6）和日间（n = 4）精度下，在25μg kg（-1）的浓度下评估方法精度，相对标准偏差小于6.9％。最后，该方法已成功应用于不同洗发剂样品中的1,4-二恶烷的分析。

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