咪鲜胺及其代谢物在芹菜和生姜中的残留行为及膳食风险评估

为研究咪鲜胺及其代谢物在芹菜和生姜中的残留行为及膳食摄入风险，开展咪鲜胺及其代谢物在芹菜和生姜上的1年6地规范残留试验，气相色谱法(GC-ECD)分析样品，采用农药残留联席会议的方法评价咪鲜胺及其代谢物在芹菜和生姜中的膳食摄入风险。在咪鲜胺的添加水平为0.02、0.1、1 mg/kg时，咪鲜胺在姜上的平均回收率为77%~87%，相对标准偏差为3%~13%。在咪鲜胺添加水平为0.05、0.5、1、10 mg/kg时，咪鲜胺在芹菜上的平均回收率为75%~114%，相对标准偏差为3%~6%。咪鲜胺在芹菜中的半衰期为6.1~6.8 d。一般人群对咪鲜胺的国家估算每日摄入量(NEDI)为0.67331 mg，膳食摄入风险概率为106.9%。试验结果显示，咪鲜胺及其代谢物在中国普通人群的膳食摄入风险不在可接受范围内，本试验为咪鲜胺的合理使用、科学监管及制定咪鲜胺在芹菜和生姜上的最大残留限量(MRL)标准提供试验数据依据。

Residue Behavior and Dietary Risk Assessment of Prochloraz and Its Metabolites in Celery and Ginger

In order to study the residue behavior and dietary intake risk of prochloraz and its metabolites in celery and ginger, the 1-year and 6-site standardized residue test of prochloraz and its metabolites in celery and ginger was carried out, samples were analyzed by gas chromatography (GC-ECD), and the dietary intake risk of prochloraz and its metabolites in celery and ginger were evaluated by using the methods of Joint Meeting on Pesticide Residues. When the adding levels of prochloraz were 0.02, 0.1 and 1 mg/kg, the average recovery rate of prochloraz in ginger was 77%-87%, and its relative standard deviation was 3%-13%.When the adding levels of prochloraz were 0.05, 0.5, 1 and 10 mg/kg, the average recovery rate of prochloraz in celery was 75%-114%, and its relative standard deviation was 3%-6%. The half-life of prochloraz in celery was from 6.1-6.8 d. The national estimated daily intake (NEDI) of prochloraz for the general population was 0.67331 mg/d, and the risk probability of dietary intake was 106.9%. The results show that the dietary intake risk of prochloraz and its metabolites is not acceptable for the general population of China. This experiment provides a basis for the rational application and scientific supervision of prochloraz in vegetables, and the establishment of Maximum Residue Limit (MRL) standards of prochloraz and its metabolites in celery and ginger.