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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Ultrasound-assisted low-density solvent dispersive liquid-liquid extraction for the determination of alkanolamines and alkylamines in cosmetics with ion chromatography
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Ultrasound-assisted low-density solvent dispersive liquid-liquid extraction for the determination of alkanolamines and alkylamines in cosmetics with ion chromatography

机译：超声辅助低密度溶剂分散液液萃取-离子色谱法测定化妆品中的烷醇胺和烷基胺

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摘要

A new one-step sample preparation technique termed ultrasound-assisted low-density solvent dispersive liquid-liquid extraction (UA-LDS-DLLE) coupled with ion chromatography (IC) was developed for the determination of three alkanolamines and two alkylamines in complex samples. Sample matrices were rapidly dissolved and dispersed to form cloudy solutions by using two solvents, where target analytes were transferred into acid solutions, while liposoluble substances were dissolved in cyclohexane. The obtained extracts could be used directly for injection analysis without any additional purification because the potential matrix interferences had been effectively eliminated in extraction process. The extraction efficiency could be markedly enhanced and the extraction could be quickly accomplished within 13 min under the synergistic effects of ultrasound radiation, vibration and heating. Various parameters influencing extraction efficiency were evaluated using orthogonal array experimental design. The extraction performance of the approach was demonstrated for the determination of target analytes in 15 commercial cosmetics covering very different matrices. Linearity ranges of 0.3-50 mg L~(-1) and limits of detection varying from 0.072 to 0.12 mg L~(-1) were achieved. The recoveries ranged from 86.9-108.5% with the relative standard deviations (RSDs) of 1.2-6.2%. The method was proved to be a simple and effective extraction technique that provided an attractive alternative to the analysis of trace amounts of target analytes in large numbers of cosmetics.
机译：建立了一种新的一步制备样品的技术，称为超声辅助低密度溶剂分散液-液萃取（UA-LDS-DLLE）和离子色谱法（IC），用于测定复杂样品中的三种烷醇胺和两种烷基胺。使用两种溶剂将样品基质快速溶解并分散以形成浑浊溶液，将目标分析物转移到酸性溶液中，而将脂溶性物质溶解在环己烷中。所获得的提取物可直接用于注射分析，而无需任何其他纯化，因为在提取过程中已有效消除了潜在的基质干扰。在超声辐射，振动和加热的协同作用下，提取效率可以得到显着提高，提取可以在13分钟内迅速完成。使用正交阵列实验设计评估了影响提取效率的各种参数。演示了该方法的萃取性能，可用于测定涵盖非常不同基质的15种商业化妆品中的目标分析物。线性范围为0.3-50 mg L〜（-1），检出限为0.072至0.12 mg L〜（-1）。回收率范围为86.9-108.5％，相对标准偏差（RSD）为1.2-6.2％。该方法被证明是一种简单有效的提取技术，为分析大量化妆品中的痕量目标分析物提供了有吸引力的替代方法。

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