中文摘要：本文构建了一种基于离子液固化的新型注射器分散液-液微萃取法，并与高效液相色谱-紫外检测器联用检测水和茶饮料中五种苯甲酰脲类农药残留。在优化条件下，获得较满意的检测结果：在2-500μg/L范围内，相关系数大于0.99，线性关系良好，检测限在0.29-0.59μg/L范围，五种苯甲酰脲类农药的回收率均在85.93%-90.52%范围。3天的观察数据显示：日间和日内相对标准偏差均小于5.36%。该方法成功地应用于实际水和茶饮料样本中苯甲酰脲类农药残留检测。
外文摘要：A novel in-syringe dispersive liquid-liquid microextraction based on the solidification of ionic liquids (in-syringe SIL-DLLME) was coupled with high-performance liquid chromatography-ultraviolet detector (HPLC-UVD) to detect five benzoylurea insecticides (BUs) in water and tea beverage samples. In this method, the hydrophobic ionic liquid [N-8881][PF6] was formed in situ by the metathesis reaction between [N-8881]Cl and the anion exchange reagent KPF6 to extract the target analytes. The whole extraction procedure was performed in a syringe. The solidified extractant could be separated from the aqueous phase by exposing the emulsified extraction solution to an ice bath and then easily collected by squeezing out the aqueous phase through the prepared NWPP-based needle. Various parameters affecting the extraction efficiency, such as the amount of [N-8881]Cl, the molar ratio of [N-8881]Cl to KPF6, salt addition, cooling time, solution temperature, sample pH and sample volume, were evaluated. Under the optimized conditions, the proposed method was validated with satisfactory results: good linearities with coefficients of determination greater than 0.99 were obtained in the range of 2-500 mu g L-1; the limits of detection varied between 0.29 and 0.59 mu g L-1; the recoveries of the five benzoylurea insecticides ranged from 85.93% to 90.52%; and the intra-day (n=3) and inter-day (n=3) relative standard deviations were less than 5.36%. Finally, the proposed method was successfully used for the determination of BUs in real water and tea beverage samples.
外文关键词：Benzoylurea insecticides, Syringe, Dispersive liquid-liquid microextraction, Ionic liquids, Solidification
作者：Wang, Huazi; Hu, Lu; Li, Wanzhen; Yang, Xiaoling; Lu, Runhua; Zhang, Sanbing; Zhou, Wenfeng; Gao, Haixiang; Li, Jing
作者单位：China Agr Univ, Dept Appl Chem, Coll Sci, Yuanmingyuan West Rd 2, Beijing 100193, Peoples R China.
期刊名称：TALANTA
期刊影响因子：4.035
出版年份：2017
出版刊次：1
点击下载：基于离子液固化的注射器分散液-液微萃取法检测水和茶饮料中的苯甲酰脲类农药残留
