Dual-template imprinted polymers for class-selective solid-phase extraction of seventeen triazine herbicides and metabolites in agro-products
文献类型： 外文期刊
第一作者： Wang, Shanshan
作者： Wang, Shanshan;She, Yongxin;Hong, Sihui;Du, Xinwei;Yan, Mengmeng;Qi, Yan;Wang, Miao;Wang, Jing;Wang, Yanli;Jiang, Wenyan
作者机构：
关键词： Dual-template; Molecularly imprinted solid-phase extraction; Triazine herbicides and metabolites; LC-MS/MS
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）
ISSN： 0304-3894
年卷期： 2019 年 367 卷
页码：
收录情况： SCI
摘要： A novel dual-template molecularly imprinted polymer (DMIP) was prepared with atrazine and prometryn as the template and applied as a class-specific adsorbent for simultaneously selective solid-phase extraction of seventeen triazine herbicides and metabolites from complex matrices. For comparison, a non-imprinted polymer (NIP) and two single-template imprinted polymers (SMIPs) were also synthesized using the same procedure of DMIP, but in the absence of the template (NIP) or with one template (SMIP). Various parameters affecting the extraction performance of DMIP-SPE were investigated in detail. Under the optimum conditions, the enrichment efficiency, class-selectivity and reusability of DMIP-SPE were evaluated. Only DMIP-SPE possessed high affinity and good selective recognition ability for all the seventeen targets including chloro-, thiomethyl- and methoxytriazines. Further, a DMIP-SPE-LC-MS/MS method was developed for simultaneously determining trace triazine herbicides and metabolites in maize, wheat and cottonseed samples. The method showed good linearity (r > 0.9941) in the range of 10-200 mu g kg(-1), high sensitivity with low limits of detection of 0.5-8.8 mu g kg(-1), and satisfactory recoveries of 61.3-105.9% with relative standard deviations of 2.1-10.7%. These results highlighted the good application prospect of the multi/dual-template imprinting strategy in the high-throughput analysis of various concerned contaminants in agro-products.
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