Zhai Rongqi, Zhang Kaige, Chen Ge, Liu Guangyang, Huang Xiaodong, Gao Mingkun, Zhou Jie, Xu Xiaomin, Li Lingyun, Zhang Yanguo, Wang Jing, Jin Maojun, Xu Donghui, Abd El-Aty A M
Key Laboratory of Vegetables Quality and Safety Control, Laboratory of Quality & Safety Risk Assessment for Vegetable Products, Institute of Vegetables and Flowers, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing, China.
Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standard and Testing Technology for Agro-Products, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing, China.
Front Nutr. 2022 Feb 23;9:846333. doi: 10.3389/fnut.2022.846333. eCollection 2022.
The demand for Chinese chives is growing as they are also rich in vitamins, fiber, and sulfur nutrients. Chinese chives should be sprayed with imidacloprid to control pests and diseases to safeguard their yield and to meet the demands of East Asian consumers for Chinese chives. Overspraying of imidacloprid can lead to residues in Chinese chives, posing a severe risk to human health. To reduce the harmful effects of imidacloprid residues on humans, we investigated the imidacloprid dissipation pattern and the final residue on Chinese chives using the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Good linearity ( = 0.9988), accuracy (expressed as recovery % of 78.34-91.17%), precision [expressed as relative SDs (RSDs) of 0.48-6.43%], and sensitivity [a limit of quantification (LOQ) ≤ 8.07 × 10 mg/kg] were achieved. The dissipation dynamics were consistent with the first-order kinetics, with a half-life of 2.92 days. The final residual levels on Chinese chives were 0.00923-0.166 mg/kg, which is lower than the maximum residue limits (MRLs) of 1 mg/kg for imidacloprid on Chinese chives. A risk assessment index of <1 indicates that Chinese chives are safe for consumption.
由于韭菜富含维生素、纤维和硫营养成分，其需求量正在增长。韭菜应喷洒吡虫啉以控制病虫害，保障产量，并满足东亚消费者对韭菜的需求。过量喷洒吡虫啉会导致韭菜中有残留，对人体健康构成严重风险。为了降低吡虫啉残留对人体的有害影响，我们采用快速、简便、廉价、有效、耐用且安全（QuEChERS）的方法结合液相色谱-串联质谱法（LC-MS/MS），研究了吡虫啉在韭菜中的消散模式和最终残留量。实现了良好的线性关系（r = 0.9988）、准确度（以回收率78.34 - 91.17%表示）、精密度[以相对标准偏差（RSD）0.48 - 6.43%表示]和灵敏度[定量限（LOQ）≤ 8.07×10⁻³mg/kg]。消散动态符合一级动力学，半衰期为2.92天。韭菜上的最终残留水平为0.00923 - 0.166mg/kg，低于吡虫啉在韭菜上1mg/kg的最大残留限量（MRLs）。风险评估指数<1表明韭菜食用安全。
