离子色谱法检测香蕉中乙烯利的残留降解动态

Determination of ethephon residue degradation dynamics in banana by ion chromatography

文中采用离子色谱,并使用新的前处理过程,得出乙烯利在香蕉中的残留消解完全符合一级反应动力学方程式。乙烯利在香蕉鲜果上的半衰期为1.4-3.2 d,按推荐剂量施用的情况下,乙烯利在不同成熟度的香蕉全果中的最小残留为：7成熟,14.796 mg/kg。在不同成熟度的香蕉果肉中的最小残留为未检出,根据数据体现以及各个国家的MRL值作为参考,建议我国乙烯利在香蕉中最大残留限量（MRL值）推荐值为2 m/g。

To evaluate residues dynamics of ethephon in banana,field test for ethephon residue in banana was conducted in Zhanjiang City, Guangdong Province. This experiment adopted the high ion chromatography and the new pretreatment process. The residues and degradation dynamics of ethephon in banana conformed completely to the e- quation of first-class reaction kinetic, the half-fife of degradation for ethephon was 1.4 - 3.2 d in banana. According to the recommended dosage,the lowest residue in 70% mature banana whole fruit was 14. 796 mg/kg, the lowest in ba- nana pulp was undetected. Considered the data and MRL from all over the earth, this paper suggested that the maxi- mum recommended residue limit was 2 mg/kg in banana.