Su Lin, Wu Zhuqiang, Ruan Guihua, Huang Yipeng
Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, Guangxi, China.
Mikrochim Acta. 2024 Dec 30;192(1):44. doi: 10.1007/s00604-024-06890-4.
Polymeric high internal phase emulsions decorated with covalent organic frameworks (polyHIPEs-COFs) were synthesized and used as the sorbent for cyantraniliprole and chlorantraniliprole. Pickering high internal phase emulsions stabilized by covalent organic frameworks solid particles and liquid surfactants (Span80 and polyvinylpyrrolidone) endow the composites with open-cell structures and superwettability. The amphiphilicity and open-cell structures enable rapid adsorption and desorption for cyantraniliprole and chlorantraniliprole, and the solid-phase extraction process can be completed in 5 min. The adsorption efficiencies of polyHIPEs-COFs for cyantraniliprole and chlorantraniliprole are above 85.19%, but lower than 10% for fenvalerate, anti-aphid, and chlorpyrifos, demonstrating the good adsorption selectivity for cyantraniliprole and chlorantraniliprole. The adsorption efficiencies of cyantraniliprole and chlorantraniliprole using a same polyHIPEs-COFs and five different batches of polyHIPEs-COFs range from 94.25 to 100.00%, revealing the good reproducibility of the sorbent. In addition, the polyHIPEs-COF-based solid-phase extraction combined with high-performance liquid chromatography-ultraviolet detector (HPLC-UV) was developed for determination of bisamide insecticides in vegetable (eggplants, tomatoes, and peppers) samples. Results showed that the method was feasible to determine the cyantraniliprole and chlorantraniliprole in real vegetable samples with a linear range of 0.012-1.2 μg/kg and limits of detection of 0.0075-0.0090 μg/kg. The recoveries of cyantraniliprole and chlorantraniliprole spiked in vegetable samples ranged from 85.00 to 100.00% with relative standard deviations less than 3.52%. The study indicates the feasibility of amphiphilic polyHIPEs-COFs in extraction and enrichment of bisamide insecticides from vegetable samples for HPLC-UV analysis.
合成了用共价有机框架修饰的聚合物高内相乳液（聚高内相乳液-共价有机框架，polyHIPEs-COFs），并将其用作氰虫酰胺和氯虫酰胺的吸附剂。由共价有机框架固体颗粒和液体表面活性剂（Span80和聚乙烯吡咯烷酮）稳定的皮克林高内相乳液赋予复合材料开孔结构和超润湿性。两亲性和开孔结构使得氰虫酰胺和氯虫酰胺能够快速吸附和解吸，固相萃取过程可在5分钟内完成。聚高内相乳液-共价有机框架对氰虫酰胺和氯虫酰胺的吸附效率高于85.19%，但对氰戊菊酯、抗蚜威和毒死蜱的吸附效率低于10%，表明其对氰虫酰胺和氯虫酰胺具有良好的吸附选择性。使用同一批聚高内相乳液-共价有机框架和五批不同的聚高内相乳液-共价有机框架对氰虫酰胺和氯虫酰胺的吸附效率在94.25%至100.00%之间，表明吸附剂具有良好的重现性。此外，开发了基于聚高内相乳液-共价有机框架的固相萃取结合高效液相色谱-紫外检测器（HPLC-UV）用于测定蔬菜（茄子、西红柿和辣椒）样品中的双酰胺类杀虫剂。结果表明，该方法用于测定实际蔬菜样品中的氰虫酰胺和氯虫酰胺是可行的，线性范围为0.012 - 1.2μg/kg，检测限为0.0075 - 0.0090μg/kg。添加到蔬菜样品中的氰虫酰胺和氯虫酰胺的回收率在85.00%至100.00%之间，相对标准偏差小于3.52%。该研究表明两亲性聚高内相乳液-共价有机框架用于从蔬菜样品中萃取和富集双酰胺类杀虫剂以进行HPLC-UV分析的可行性。
