Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa; DSI/NRF SARChI, Nanotechnology for Water, University of Johannesburg, Doornfontein 2028, South Africa.
Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa; DSI/NRF SARChI, Nanotechnology for Water, University of Johannesburg, Doornfontein 2028, South Africa; DSI/Mintek Nanotechnology Innovation Center, University of Johannesburg, Doornfontein 2028, South Africa.
J Chromatogr A. 2022 Jan 4;1661:462685. doi: 10.1016/j.chroma.2021.462685. Epub 2021 Nov 22.
A nanostructured material composed of zeolitic imidazolate framework-67 and magnetic porous porphyrin organic polymer (ZIF-67@MPPOP) was successfully synthesized and applied for the enrichment of neonicotinoid insecticides in river water. The analytes were detected and quantified using high performance liquid chromatography coupled with diode array detector (HPLC-DAD) and liquid chromatography mass spectrometry (LC-MS). Influential experimental parameters were optimized using response surface methodology based on Box Behnken design. The adsorption capacities were 69.46, 80.53, 85.39 and 90.0 mg g for thiamethoxam, imidacloprid, acetamiprid and clothianidin, respectively. At optimal experimental conditions, low limit of detection (LOD), limit of quantification (LOQ) and linearity were 0.0091-0.04 µg L, 0.04-0.13 µg L and (0.04-600 µg L), respectively. The relative standard deviation used to evaluate the reproducibility and repeatability of the method was less than 5%. Finally, the method was employed for determination of four neonicotinoid insecticides in river water.
一种由沸石咪唑酯骨架-67 和磁性多孔卟啉有机聚合物（ZIF-67@MPPOP）组成的纳米结构材料被成功合成，并应用于河水中毒死蜱类杀虫剂的富集。使用高效液相色谱-二极管阵列检测（HPLC-DAD）和液相色谱-质谱（LC-MS）对分析物进行检测和定量。使用基于 Box-Behnken 设计的响应面法优化了有影响的实验参数。对噻虫嗪、吡虫啉、噻虫胺和噻虫啉的吸附容量分别为 69.46、80.53、85.39 和 90.0 mg g。在最佳实验条件下，检测限（LOD）、定量限（LOQ）和线性范围分别为 0.0091-0.04μg L、0.04-0.13μg L 和（0.04-600μg L）。用于评估方法重现性和重复性的相对标准偏差小于 5%。最后，该方法用于测定河水中的四种新烟碱类杀虫剂。
