Xu Yan, Li Xiangxin, Zhang Wanli, Jiang Haitao, Pu Yijing, Cao Jiankang, Jiang Weibo
College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
Food Chem. 2021 May 15;344:128650. doi: 10.1016/j.foodchem.2020.128650. Epub 2020 Nov 18.
Zirconium(Ⅳ)-based metal-organic framework (MOF)-UiO-66-NH was fabricated to adsorb the imidacloprid and thiamethoxam in fruit samples before analysis using UPLC-MS/MS. The UiO-66-NH was confirmed by SEM, FTIR, and XRD. Key experimental parameters were investigated by response surface methodology (RSM). The desirability recovery of imidacloprid was 94.52% under optimum conditions (mount of adsorbent = 52.48 mg, volume of eluent = 5.18 mL, pH = 9, extraction time = 15 min). The desirability recovery of thiamethoxam was 93.57% under optimum conditions (mount of adsorbent = 50.58 mg, volume of eluent = 2.6 mL, pH = 5.65, extraction time = 11.94 min). Under the optimal conditions, the actual recovery of imidacloprid and thiamethoxam was 92.39% and 94.37%, respectively. Besides, the method was applied successfully to detect imidacloprid and thiamethoxam in different fruit samples. The results demonstrated that the UiO-66-NH is an excellent adsorbent for the extraction imidacloprid and thiamethoxam from fruit samples.
制备了锆（Ⅳ）基金属有机框架材料（MOF）-UiO-66-NH，用于在采用超高效液相色谱-串联质谱法（UPLC-MS/MS）分析之前吸附水果样品中的吡虫啉和噻虫嗪。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）对UiO-66-NH进行了表征。采用响应面法（RSM）研究了关键实验参数。在最佳条件下（吸附剂用量=52.48 mg，洗脱剂体积=5.18 mL，pH=9，萃取时间=15 min），吡虫啉的期望回收率为94.52%。在最佳条件下（吸附剂用量=50.58 mg，洗脱剂体积=2.6 mL，pH=5.65，萃取时间=11.94 min），噻虫嗪的期望回收率为93.57%。在最佳条件下，吡虫啉和噻虫嗪的实际回收率分别为92.39%和94.37%。此外，该方法成功应用于不同水果样品中吡虫啉和噻虫嗪的检测。结果表明，UiO-66-NH是一种从水果样品中萃取吡虫啉和噻虫嗪的优良吸附剂。
