Dissipation and residue of ethephon in maize field

作     者：DONG Jian-nan MA Yong-qiang LIU Feng-mao JIANG Nai-wen JIAN Qiu 

作者机构：Department of Applied ChemistryCollege of ScienceChina Agricultural University Institute for the Control of AgrochemicalsMinistry of Agriculture 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2015年第14卷第1期

页      面：106-113页

核心收录：

学科分类：09[农学] 0710[理学-生物学] 0832[工学-食品科学与工程（可授工学、农学学位）] 090403[农学-农药学(可授农学、理学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 0905[农学-畜牧学] 0906[农学-兽医学] 0904[农学-植物保护] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：partly supported by the National Natural Science Foundation of China(21177155) 

主　　题：ethephon residue maize degradation storage stability 

摘      要：A rapid and reliable method was developed for analysis of ethephon residues in maize, in combination with the investigation of its dissipation in field condition and stabilities during the sample storage. The residue analytical method in maize plant, maize kernel and soil was developed based on the quantification of ethylene produced from the derivatization of ethephon residue by adding the saturated potassium hydroxide solution to the sample. The determination was carried out by using the head space gas chromatography with flame ionization detector （HS-GC-FID）. The limit of quantification （LOQ） of the method for maize plant was 0.05, 0.02 mg kg-1 for maize kernel and 0.05 mg kg-1 for soil, respectively. The fortified recoveries of the method were from 84.6-102.6%, with relative standard deviations of 7.9-3.8%. Using the methods, the dissipation of ephethon in maize plant or soil was investigated. The half life of ethephon degradation was from 0.6 to 3.3 d for plant and 0.7 to 5.7 d for soil, respectively. The storage stabilities of ethephon residues were determined in fresh and dry kernels with homogenization and without homogenization process. And the result showed that ethephon residues in maize kernels were stable under-18℃ for 6 mon. The results were helpful to monitor the residue dissipation of ethephon in the maize ecosystem for further ecological risk assessment.