State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, PR China.
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, PR China; Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, PR China; Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, PR China.
Environ Pollut. 2023 Jun 15;327:121574. doi: 10.1016/j.envpol.2023.121574. Epub 2023 Apr 11.
Magnetic titanium dioxide (FeO-TiO) was prepared and utilized as the cleanup adsorbent and separation medium to modify the QuEChERS method, affording a facile, robust, and rapid magnetic "one-step" pretreatment method for the determination of multi-pesticide residues in fish. The pretreatment key parameters, such as the dosages of the purification adsorbents (FeO-TiO and PSA), the dehydrating and salting out reagents, were systematically optimized by the orthogonal test method. Under the optimal conditions, satisfactory results of method evaluation were obtained. Good linearity of 127 target analytes was obtained from 1 to 250 μg L. The recoveries of 127 analytes at five spiked levels of 10, 25, 50, 125, and 250 μg kg ranged from 71.0% to 129% with RSDs less than 15.0%. The method LOQs (MLOQs) of 127 analytes were 10 μg kg, meeting the requirement for multi-pesticide residues analysis in fish. Additionally, this magnetic "one-step" method was used for the analysis of multi-pesticide residues in real fish samples collected from Zhejiang Province, China. In summary, this method can work as a viable tool for multi-pesticide residues monitoring in fish.
磁性二氧化钛（FeO-TiO）被制备并用作净化吸附剂和分离介质，以改进 QuEChERS 方法，提供了一种简便、稳健和快速的磁性“一步”预处理方法，用于测定鱼类中的多农药残留。通过正交试验方法系统优化了预处理关键参数，如净化吸附剂（FeO-TiO 和 PSA）和脱水盐析试剂的用量。在最佳条件下，得到了令人满意的方法评估结果。127 种目标分析物在 1 至 250μg/L 的范围内具有良好的线性关系。127 种分析物在 10、25、50、125 和 250μg/kg 五个加标水平下的回收率为 71.0%至 129%，相对标准偏差（RSD）小于 15.0%。127 种分析物的方法检出限（MLOQs）为 10μg/kg，满足鱼类中多农药残留分析的要求。此外，该磁性“一步”法还用于分析来自中国浙江省的真实鱼样中的多农药残留。总之，该方法可以作为鱼类中多农药残留监测的一种可行工具。
