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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Stereoselective Analysis of Chiral Pyrethroid Insecticides Tetramethrin and alpha-Cypermethrin in Fruits, Vegetables, and Cereals
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Stereoselective Analysis of Chiral Pyrethroid Insecticides Tetramethrin and alpha-Cypermethrin in Fruits, Vegetables, and Cereals

机译：细胞，蔬菜和谷物中手性拟除虫菊酯杀虫剂的立体选择性分析，蔬菜，蔬菜和谷物中的α-二甲酸

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摘要

This manuscript presents an effective and robust method for simultaneous stereoselective determination of two pyrethroid insecticides, tetramethrin and alpha-cypermethrin in different food products by high-performance liquid chromatography. Enantioseparation was carried out using reversed-phase chromatography, and the influences of four polysaccharide-based chiral columns, mobile phase composition, and column temperature on retention were fully investigated. Satisfactory separation was obtained on Chiralpak IG column using acetonitrile-water (75:25, v/v) under isocratic conditions. To extract and purify the target analytes from food matrices, matrix solid-phase dispersion was employed with C-18 as dispersant and primary secondary amine as well as graphitized carbon black as cleanup sorbents. Response surface method based on Box-Behnken design was implemented to assist optimization of the extraction variables. Then, method validation was done in real samples including specificity, linearity, sensitivity, trueness, precision, as well as stability, and its analytical performance fulfills the criteria recommended by the European Union SANTE/11945/2015, demonstrating its applicability in studying the stereochemistry of chiral tetramethrin and alpha-cypermethrin in food products.
机译：该稿件通过高效液相色谱，提出了一种有效且稳健的方法，用于同时立体选择性测定两种拟除虫菊酯杀虫剂，四甲酰酚和α-二甲磺酸丁菊酯。使用反相色谱法进行映对映射，并进行了四种基于多糖的手性柱，流动相组合物和柱温对保留的影响。在等离子条件下使用乙腈 - 水（75:25，V / V）在Chiralpak Ig柱上获得令人满意的分离。为了从食物基质中提取和纯化目标分析物，基质固相分散体用C-18作为分散剂和初级仲胺，以及石墨化的炭黑作为清洁吸附剂。基于BATE-BEHNKEN设计的响应曲面法实施以帮助优化提取变量。然后，方法验证是在实际样本中完成的，包括特异性，线性度，灵敏度，真实，精度以及稳定性，其分析性能满足欧盟Sante / 11945/1010 / 2015推荐的标准，证明了其在研究立体化学方面的适用性在食品中的手性四甲菊酯和α-氯氰菊酯。

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