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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >A simple and highly-available microextraction of benzoic and sorbic acids in beverages and soy sauce samples for high performance liquid chromatography with ultraviolet detection
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A simple and highly-available microextraction of benzoic and sorbic acids in beverages and soy sauce samples for high performance liquid chromatography with ultraviolet detection

机译：一种简单且高度可用的苯甲酸和山梨酸的微萃取，饮料和大豆酱样品的高性能液相色谱，具有紫外线检测

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摘要

A simple and highly-available air-assisted dispersive liquid-liquid microextraction procedure with organic phase solidification (AA-DLLME-OPS) was developed as new approach for pretreatment of complex sample matrix. Menthol was investigated as novel extractant for the AA-DLLME-OPS. In this procedure, a cloudy solution of fine molten menthol droplets is formed when a mixture of molten menthol and aqueous sample is rapidly aspirated into a dispenser and injected into an extraction vial. In the AA-DLLME-OPS, air bubbles promote molten menthol dispersion into aqueous sample phase. Finally, the obtained mixture is cooled and menthol phase is solidified because of the low melting point, which facilitates collection for analysis. To demonstrate the efficiency of the suggested approach, the AA-DLLME-OPS procedure was applied for the HPLC-UV determination of benzoic and sorbic acids as proof-of-concept analytes in beverages and soy sauce samples. The procedure developed provides microextraction of benzoic and sorbic acids from samples with recovery from 93 to 105% and from 96 to 101%, respectively. Under optimal experimental conditions the linear detection ranges were found to be 0.1-150 mg L-1 for benzoic acid and 0.05-100 mg L-1 for sorbic acid with LODs calculated from a blank test, based on 3 sigma, 0.03 mg L-1 and 0.02 mg L-1, respectively. (C) 2018 Elsevier B.V. All rights reserved.
机译：具有有机相凝固（AA-DILLME-OPS）的简单且高可用的空气辅助分散液体微萃取程序作为复杂样品基质预处理的新方法。薄荷醇被研究为AA-DLLME-OPS的新型萃取剂。在该过程中，当熔融薄荷醇和水样品迅速吸入分配器中并注入萃取小瓶时，形成多云的细熔融薄荷醇液滴。在AA-DLLME-OPS中，气泡将熔融薄荷醇分散到水性样品相中。最后，冷却所得混合物，由于低熔点，薄荷醇相凝固，便于收集进行分析。为了证明所提出的方法的效率，AA-DILLME-OPS程序被应用于HPLC-UV测定苯甲酸和山梨酸作为饮料和酱油样品上的概念证据分析。该程序开发的程序将苯甲酸和山梨酸的微萃取分别从93-105％和96％恢复的样品中的样品。在最佳实验条件下，苯甲酸的线性检测范围为0.1-150mg L-1，对于山梨酸的0.05-100mg L-1，基于3 sigma，0.03mg分别为1和0.02mg L-1。 （c）2018年elestvier b.v.保留所有权利。

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