摘要
2011—2012年在黑龙江肇东、河南祝楼、江苏句容三地通过田间试验,研究了盐酸吗啉胍在水稻植株和田水中的消解动态。水稻植株和田水采用UPLC-MS/MS正离子扫描测定残留的盐酸吗啉胍。结果表明,水稻植株和田水的3种添加浓度（0.005、0.05、0.5 mg·kg^-1）平均回收率分别为92.50%-109.20%和86.40%-107.20%,相对标准偏差分别为6.10%-6.90%和0.73%-3.10%。本方法在植株和田水中的最低检出浓度为0.005mg·kg^-1。从消解动力学方程可知,盐酸吗啉胍在水稻植株及田水中的消解半衰期分别为1.2-4.7、1.0-3.5 d。从结果判断盐酸吗啉胍属较易降解农药。
Through field experiments, which were conducted in Zhaodong County of Heilongjiang Province, Zhulou County of Henan Province and Jurong County of Jiangsu Province, the degradation dynamics of moroxydine hydrochloride in rice plant and field water were investigated.The detection was performed by tandem mass spectrometry with electrospray ionization in positive mode（ESI＋）. The results showed that the average recoveries of rice plant and field water at three spiked levels（0.005, 0.05, 0.5 mg·kg^-1）were found in the range of 92.50%-109.20%with RSD 6.10%-6.90% and 86.40%-107.2% with RSD 0.73%-3.10%, respectively. Limits of detection（LOD）of plant and water were 0.005mg·kg^-1. The degradation kinetic equation showed that the half-life of moroxydine hydrochloride in rice plant and field water was 1.2-4.7 d,1.0-3.5 d, respectively. The moroxydine hydrochloride was proved to be an easily degradable pesticide.
出处
《农业资源与环境学报》
CAS
2014年第5期482-486,共5页
Journal of Agricultural Resources and Environment
基金
农业部农药残留基金项目(2011F273)
农业部粮油产品质量安全风险评估项目(2014FP06)
关键词
盐酸吗啉胍
降解动态
水稻植株
田水
moroxydine hydrochloride
degradation behavior
rice plant
field water
