咪鲜胺在香蕉中的消解与分布及其膳食摄入风险评估
Dissipation and Distribution of Prochloraz in Bananas and a Risk Assessment of Its Dietary Intake.
作者信息
Huang Jiajian, Lin Sukun, Zhou Jingtong, Chen Huiya, Tang Shiqi, Wu Jian, Huang Suqing, Cheng Dongmei, Zhang Zhixiang
机构信息
Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
出版信息
Toxics. 2022 Jul 29;10(8):435. doi: 10.3390/toxics10080435.
BACKGROUND
As a systematic fungicide, prochloraz is often used to control banana freckle disease, and it is significant to assess the safety and risk of prochloraz.
METHODS
The dissipation kinetics and distribution of prochloraz in bananas were measured by high-performance liquid chromatography (HPLC).
RESULTS
The results showed that the fortified recoveries in bananas were 83.01-99.12%, and the relative standard deviations (RSDs) were 2.45-7.84%. The half-life of prochloraz in banana peel (3.93-5.60 d) was significantly lower than it was in whole banana (8.25-10.80 d) and banana pulp (10.35-12.84 d). The terminal residue of prochloraz in banana fruits was below the maximum residue level (MRL, China) at pre-harvest intervals (PHI) of 21 d. Moreover, the residue of prochloraz in banana peel was always 1.06-7.71 times greater than it was in banana pulp. The dietary risk assessment results indicated that the prochloraz residue in bananas at PHI of 21 d was safe for representative populations. (4) Conclusions: We found that a 26.7% prochloraz emulsion oil in water (EW) diluted 1000-fold and sprayed three times under field conditions was safe and reliable, providing a reference for the safe application of prochloraz in bananas.
背景
作为一种系统性杀菌剂，咪鲜胺常用于防治香蕉叶斑病，评估咪鲜胺的安全性和风险具有重要意义。
方法
采用高效液相色谱法（HPLC）测定咪鲜胺在香蕉中的消解动力学和分布情况。
结果
结果表明，香蕉中咪鲜胺的添加回收率为83.01% - 99.12%，相对标准偏差（RSD）为2.45% - 7.84%。咪鲜胺在香蕉果皮中的半衰期（3.93 - 5.60天）显著低于在整根香蕉（8.25 - 10.80天）和香蕉果肉（10.35 - 12.84天）中的半衰期。在收获前间隔期（PHI）为21天时，香蕉果实中咪鲜胺的最终残留量低于中国最大残留限量（MRL）。此外，香蕉果皮中咪鲜胺的残留量始终比香蕉果肉中的高1.06 - 7.71倍。膳食风险评估结果表明，在PHI为21天时香蕉中咪鲜胺残留量对代表性人群是安全的。（4）结论：我们发现，在田间条件下，将26.7%咪鲜胺水乳剂（EW）稀释1000倍并喷施3次是安全可靠的，为咪鲜胺在香蕉中的安全应用提供了参考。
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