Effervescence-assisted beta-cyclodextrin/attapulgite composite for the in-syringe dispersive solid-phase extraction of pyrethroids in environmental water samples
Effervescence-assisted beta-cyclodextrin/attapulgite composite for the in-syringe dispersive solid-phase extraction of pyrethroids in environmental water samples
复制标题
泡腾辅助 β-环糊精/凹凸棒土复合物用于注射器内分散固相萃取环境水样中的拟除虫菊酯
DOI：
10.1016/j.talanta.2016.03.007
复制
发表时间：
2016
期刊：
影响因子：
6.1
通讯作者：
Lu RH
中科院分区：
文献类型：
--
作者：
Yang Xiaoling;Zhang Panjie;Li Xiaobing;Hu Lu;Gao Haixiang;Zhang Sanbing;Zhou Wenfeng;Lu Runhua;Lu RH
本研究首次建立了一种用于环境样品中拟除虫菊酯的注射器内分散固相萃取（EAIS-DSPE）的增敏β-环糊精/ATP复合物（β-CD/ATP）。使用注射器进行提取程序，当片剂组分溶于水中时，少量β-CD/ATP分散到溶液中，并释放二氧化碳。然后，使用滤膜回收吸附剂，并使用乙腈直接洗脱分析物。在此过程中，β-CD/ATP吸附剂的萃取效率优于市售的C18和HLB吸附剂。此外，在萃取过程中，β-环糊精的包合作用（尤其是疏水作用）和ATP的特殊结构有助于拟除虫菊酯在水介质中的高效富集。采用Plackett-Burman设计对β-CD/ATP吸附剂的用量、解吸体积、NaH 2 PO 4/Na 2CO 3比、样品体积和pH进行筛选。采用中心组合设计对影响工艺的所有因素进行优化。在优化条件下，方法的线性范围为2.5-500 μg L-1，重复性（RSD）为1.7 - 2.3，检出限（LOD）为0.15-1.03 μg L-1，回收率为76.8-86.5%。该方法已成功应用于河水、水库水、湖水等环境样品中拟除虫菊酯的测定。
In this research, an effervescence-assisted β-cyclodextrin/attapulgite composite (β-CD/ATP) for the in-syringe dispersive solid-phase extraction (EAIS-DSPE) of pyrethroids in environmental samples was developed for the first time. A syringe was used to conduct the extraction procedure and a small amount of β-CD/ATP was dispersed into the solution with the release of carbon dioxide when the effervescent tablet components dissolved in water. Then, the sorbent was recovered using a filter membrane, and the analytes were directly eluted using acetonitrile. In the process, the β-CD/ATP sorbent resulted in an excellent extraction efficiency compared to commercially available sorbents such as C18and HLB. Moreover, in the extraction procedure, both the β-cyclodextrin inclusion interactions (especially the hydrophobic effects) and the special structure of the ATP contributed to the efficient enrichment of pyrethroids in aqueous media. The amount of β-CD/ATP sorbent, the volume of desorption, the ratio of NaH2PO4/Na2CO3, the volume of the sample, and the pH were screened using a Plackett–Burman design. All factors affecting the procedure were optimized by applying a central composite design. Under the optimized conditions, a good repeatability (RSDs) ranging from 1.7 to 2.3, linearity (2.5–500 μg L−1), limits of detection (LODs) (0.15–1.03 μg L−1), and an acceptable recoveries (76.8–86.5%) were achieved. Finally, the proposed method was successfully applied for the determination of pyrethroids in environmental samples including river water, reservoir water and lake water.