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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >High-performance liquid chromatography - Ultraviolet method for the determination of total specific migration of nine ultraviolet absorbers in food simulants based on 1,1,3,3-Tetramethylguanidine and organic phase anion exchange solid phase extraction to remove glyceride
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High-performance liquid chromatography - Ultraviolet method for the determination of total specific migration of nine ultraviolet absorbers in food simulants based on 1,1,3,3-Tetramethylguanidine and organic phase anion exchange solid phase extraction to remove glyceride

机译：高效液相色谱法-基于1,1,3,3-四甲基胍和有机相阴离子交换固相萃取去除甘油酯的紫外法测定食品模拟物中9种紫外线吸收剂的总比迁移

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摘要

The glyceride in oil, food simulant usually causes serious interferences to target analytes and leads to failure of the normal function of the RP-HPLC column. In this work, a convenient HPLC-UV method for the determination of the total specific migration of nine ultraviolet (UV) absorbers in food simulants was developed based on 1,1,3,3-tetramethylguanidine (TMG) and organic phase anion exchange (OPAE) SPE to efficiently remove glyceride in olive oil simulant. In contrast to the normal ion exchange carried out in an aqueous solution or aqueous phase environment, the OPAE SPE was performed in the organic phase environments, and the time-consuming and challenging extraction of the nine UV absorbers from vegetable oil with aqueous solution could be readily omitted. The method was proved to have good linearity (r >= 0.99992), precision (intra-day RSD <= 3.3%), and accuracy(91.0% <= recoveries <= 107%); furthermore, the lower limit of quantifications (0.05-0.2 mg/kg) in five types of food simulants(10% ethanol, 3% acetic acid, 20% ethanol, 50% ethanol and olive oil) was observed. The method was found to be well suited for quantitative determination of the total specific migration of the nine UV absorbers both in aqueous and vegetable oil simulant according to Commission Regulation (EU) No. 10/2011. Migration levels of the nine UV absorbers were determined in 31 plastic samples, and UV-24, UV-531, HHBP and UV-326 were frequently detected, especially in olive oil simulant for UV-326 in PE samples. In addition, the OPAE SPE procedure was also been applied to efficiently enrich or purify seven antioxidants in olive oil simulant. Results indicate that this procedure will have more extensive applications in the enriching or purification of the extremely weak acidic compounds with phenol hydroxyl group that are relatively stable in TMG n-hexane solution and that can be barely extracted from vegetable oil. (C) 2016 Elsevier B.V. All rights reserved.
机译：油类食品模拟物中的甘油酯通常会对目标分析物造成严重干扰，并导致RP-HPLC色谱柱的正常功能失效。在这项工作中，开发了一种基于1,1,3,3-四甲基胍（TMG）和有机相阴离子交换的便捷的HPLC-UV方法，用于测定食品模拟物中的9种紫外线（UV）吸收剂的总比迁移。 OPAE）SPE可有效去除橄榄油模拟物中的甘油酯。与在水溶液或水相环境中进行常规离子交换相反，OPAE SPE在有机相环境中进行，从植物油和水溶液中萃取九种紫外线吸收剂既费时又富挑战性容易省略。实践证明该方法具有良好的线性（r> = 0.99992），精密度（日内RSD <= 3.3％）和准确性（91.0％<=回收率<= 107％）;此外，观察到五种食品模拟物（10％乙醇，3％乙酸，20％乙醇，50％乙醇和橄榄油）的定量下限（0.05-0.2 mg / kg）。根据委员会法规（EU）第10/2011号，该方法非常适合定量测定9种紫外线吸收剂在水性和植物油模拟物中的总比迁移率。在31个塑料样品中确定了这9种紫外线吸收剂的迁移水平，并且经常检测到UV-24，UV-531，HHBP和UV-326，尤其是在PE样品中用于UV-326的橄榄油模拟物中。此外，OPAE SPE程序还用于有效富集或纯化橄榄油模拟物中的七种抗氧化剂。结果表明，该方法将在富集或纯化具有苯酚羟基的极弱酸性化合物中具有更广泛的应用，这些化合物在TMG正己烷溶液中相对稳定，几乎不能从植物油中提取。 （C）2016 Elsevier B.V.保留所有权利。

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