高效氯氟氰菊酯在香蕉中的残留消解及膳食风险评估

为了探究高效氯氟氰菊酯在香蕉中的残留消解行为和膳食摄入风险，选择海南儋州（巴西蕉）、广西南宁（威廉斯香蕉）、云南玉溪（巴西蕉）、广东佛山（过山香）四个试验地进行田间试验，采用气相色谱对高效氯氟氰菊酯在香蕉全果及果肉中的残留消解结果进行测定，并对其长期膳食暴露风险进行评估。结果表明:高效氯氟氰菊酯标准曲线线性方程为y=155711x?387.55，R2=0.9997，在0.01~1 mg/kg的添加水平下，平均回收率为79%~110%，相对标准差（RSD）为2.2%~9.5%；在香蕉中的最低检出浓度为0.01 mg/kg；高效氯氟氰菊酯在香蕉中的消解动态符合一级动力学方程，半衰期为22.1 d，消解动态方程为C=0.12878e?0.03136t；评估结果显示高效氯氟氰菊酯的膳食风险概率为76.84%，表明香蕉中残留的高效氯氟氰菊酯长期摄入膳食风险可接受。

Dissipation，Residues and Dietary Risk Assessment of Lambda-Cyhalothrin in Bananas

In order to explore the residual digestion behavior and dietary intake risk of lambda-cyhalothrin in bananas, Hainan Danzhou (Brazilian banana), Guangxi Nanning (Williams banana), Yunnan Yuxi (Brazilian banana), and Guangdong Foshan (Guoshanxiang) were selected for field experiments. The results of the residue digestion of lambda-cyhalothrin in banana fruit and pulp were determined by gas chromatography, and the long-term dietary exposure risk was evaluated. The results showed the linear equation of the standard curve of lambda-cyhalothrin was y=155711x?387.55, R2=0.9997; At the level of 0.01~1 mg/kg, the average recovery rate was 79%~110%, and the relative standard deviation (RSD) was 2.2%~9.5%; The limit of quantification(LOQ) of lambda-cyhalothrin in banana was 0.01 mg/kg; The digestion dynamics of lambda-cyhalothrin in bananas conform to the first-order kinetic equation, the half-lifewas 22.1 d, the digestion dynamic equation was C=0.12878e?0.03136t; The evaluation results showed that the dietary risk probability of lambda-cyhalothrin was 76.84%, indicating that the long-term dietary risk of lambda-cyhalothrin residues in bananas was acceptable.