摘要
为了系统地研究氯吡脲在设施甜瓜中残留及消解规律,促进设施甜瓜安全生产,笔者通过筛选样品前处理方法和仪器色谱条件,建立了氯吡脲在设施甜瓜中残留的HPLC分析方法,同时采用该方法定量分析氯吡脲在设施甜瓜中的消解动态与最终残留。结果显示,氯吡脲的添加回收率为92.6%～110%,相对标准偏差为0.00%～7.32%,最低检测浓度为0.006mg/kg,最低检出量为1.2×10-10g,线性关系良好(r=0.9997);氯吡脲在设施甜瓜中消解较快,半衰期为1.52天,使用剂量为20～30mg(ai.)/kg水溶液于雌花开放当天,或开花前2～3天均匀喷洒瓜胎(或浸瓜胎)1次,设施甜瓜收获时(施药后52天),样品中未检出氯吡脲残留(<0.006mg/kg),低于0.01mg/kg(MRL值),是安全的。
In order to systematically study residues and degradation rules of forchlorfenuron in facilities muskmelon,and promote safety to production,a residue analytical method has been developed for the determination of forchlorfenuron in facilities muskmelon by screening sample preparation methods and equipment chromatographic conditions.At the same time,the degradation and residue of forchlorfenuron in facilities muskmelon were studied by means of high performance liquid chromatography （HPLC）.The results showed that the recoveries were 92.6%-110%,and the relative standard deviations of the method were 0.00%-7.32%.Theminimum detectable concentration of forehlorfenuron was 0.006mg/kg and theminimum detectable amount of forehlorfenuron was 1.2×10 -10 g,and the linear relationship was obtained in this method （r=0.9997）.The degradation rate of forchlorfenuron in facilities muskmelon was fast with half-life of 1.52 days.No forchlorfenuron residue was detected in facilities muskmelon with a harvest withholding period of 52 days after the treatments （ 0.006mg/kg） and lower than 0.01mg/kg （MRL value）.So it was safe to dip application of 20-30 mg（ai.）/kg water on female flowers opening in the same day or 2-3 days before flowering.
出处
《中国农学通报》
CSCD
北大核心
2011年第25期200-204,共5页
Chinese Agricultural Science Bulletin
基金
银川市科技攻关项目(2009-34)
关键词
氯吡脲
设施甜瓜
消解动态
最终残留
forchlorfenuron
facilities muskmelon
degradation dynamic
terminal residue
