College of Science, Hebei Agricultural University, Baoding 071001, Hebei, China.
College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
J Chromatogr A. 2018 Feb 23;1538:1-7. doi: 10.1016/j.chroma.2018.01.033.
A hypercrosslinked triphenylamine polymer (HCTPA) was prepared through a simple one-step Friedel-Crafts alkylation reaction. The HCTPA had an extended π-conjugated system, large specific surface area and high micropore volume. In order to evaluate its extraction performance, the HCTPA was used as the adsorbent for the solid-phase extraction of the phenylurea herbicides (monuron, chlortoluron, isoproturon, monolinuron and buturon) from watermelon, tomato and cucumber samples. The main parameters that could affect the extraction efficiency including the sample volume, sample solution pH, sample solution loading rate and desorption conditions were investigated and optimized. Under the optimized conditions, the HCTPA showed a good extraction performance for the target analytes. The linear range for the quantification of the analytes was in the range of 0.4-160.0 ng g with the correlation coefficients of 0.9996-0.9999. The limits of detection (S/N = 3) of the analytes by the method ranged from 0.06 to 0.12 ng g for watermelon and tomato, and 0.06-0.15 ng g for cucumber samples. The recoveries of the analytes for the method were between 83.1% and 112.5% with the relative standard deviations below 5.5%. These results indicate that the HCTPA can be used for the enrichment of phenylurea herbicides from complex matrix samples like watermelon, tomato and cucumbers.
一种超交联三苯胺聚合物（HCTPA）通过简单的一步傅克烷基化反应制备而成。HCTPA 具有扩展的π共轭体系、大的比表面积和高的微孔体积。为了评估其萃取性能，将 HCTPA 用作固相萃取吸附剂，从西瓜、番茄和黄瓜样品中萃取苯脲类除草剂（灭草隆、绿麦隆、异丙隆、利谷隆和丁草胺）。考察并优化了影响萃取效率的主要参数，包括样品体积、样品溶液 pH 值、样品溶液加载速率和洗脱条件。在优化条件下，HCTPA 对目标分析物表现出良好的萃取性能。分析物的定量线性范围为 0.4-160.0 ng g，相关系数为 0.9996-0.9999。该方法对西瓜和番茄中分析物的检出限（S/N=3）范围为 0.06-0.12 ng g，对黄瓜样品的检出限范围为 0.06-0.15 ng g。分析物的回收率在 83.1%-112.5%之间，相对标准偏差低于 5.5%。这些结果表明，HCTPA 可用于从西瓜、番茄和黄瓜等复杂基质样品中富集苯脲类除草剂。
