香蕉中咪鲜胺的消解动态及安全性评价

Degradation dynamics and safety evaluation of prochloraz in banana

中文关键词:  香蕉  咪鲜胺  2,4,6-三氯苯酚  消解动态  安全性评价

英文关键词:banana  prochloraz  2,4,6-trichlorophenol  degradation dynamics  safety evaluation

中文摘要:

      目的 建立基质分散固相萃取-液相色谱-串联质谱法快速检测香蕉中咪鲜胺及其代谢产物2,4,6-三氯苯酚残留量的方法, 检测香蕉果皮和果肉里的残留量。方法 用浓度为50 mg/L咪鲜胺溶液处理香蕉5 min, 置于15 ℃下贮藏后, 用基质分散固相萃取-液相色谱-串联质谱法检测残留量后进行消解动态分析。结果 果皮中咪鲜胺消解动态方程式为C=35.492e-0.0648t, r2=0.9505, 残留半衰期T1/2为10.7 d。果肉中咪鲜胺消解动态方程式为C=20.212e-0.0711t, r2=0.9922, 残留半衰期T1/2为9.7 d。结论 香蕉中咪鲜胺残留尽管符合我国国家规定的限量标准, 但对幼儿存在不安全隐患。

英文摘要:

      Objective To establish a method for the rapid determination of prochloraz and its metabolites 2,4,6-trichlorophenol in banana by matrix dispersion solid phase extraction-liquid chromatography-tandem mass spectrometry. Methods The bananas were treated by 50 mg/L prochloraz and dipped 5 min, then storage at 15 ℃. Degradation dynamic was analyzed after the determination of residue by matrix dispersion solid phase extraction-liquid chromatography-tandem mass spectrometry. Results The degradation dynamics equation of prochloraz in banana peel and pulp were C=35.492e-0.0648t and C=20.212e-0.0711t. The linear correlation coefficients were: r2=0.9509, r2=0.9922. Half-life residues (T1/2) were 10.7 d and 9.7 d. Conclusion Although the prochloraz residues in banana can meet the restrictions imposed by our national standards, there are also potential risk for children.