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反相高效液相色谱法测定茶叶中氯氰菊酯和氰戊菊酯农药残留 被引量:42
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作者 李云春 易军 +2 位作者 弓振斌 张水坝 郑文慧 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2003年第1期78-82,共5页
采用V(正己烷)∶V(丙酮)=97.5∶2.5混合溶剂提取茶叶样品中的氯氰菊酯和氰戊菊酯农药残留,选用氟罗里硅土/活性炭混合柱为色谱柱和V(石油醚)/V(乙酸乙酯)=9∶1为淋洗液的方法净化待测样品.在优化的流动相配比(V(乙腈)∶V(水)=74∶26)及... 采用V(正己烷)∶V(丙酮)=97.5∶2.5混合溶剂提取茶叶样品中的氯氰菊酯和氰戊菊酯农药残留,选用氟罗里硅土/活性炭混合柱为色谱柱和V(石油醚)/V(乙酸乙酯)=9∶1为淋洗液的方法净化待测样品.在优化的流动相配比(V(乙腈)∶V(水)=74∶26)及流速(1.2mL·min-1)条件下,用配备HypersilODS柱、二极管阵列检测器的高效液相色谱仪进行了待测组分的分离和测定.实验证明茶叶样品中氯氰菊酯和氰戊菊酯添加标准的回收率分别为71.0%和76 0%,加标回收的相对标准偏差(RSD%,n=6)分别为2.5%和2.2%.本方法具有溶剂使用量少、净化效果好、操作简便、快速等特点,可用于茶叶中氯氰菊酯和氰戊菊酯的农药残留分析. 展开更多
关键词 反相高效液相色谱法 农药残留 茶叶 菊酯 氯戊菊酯 含量测定 食品检测
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二种新拟除虫菊酯对鼠伤寒沙门氏菌的诱变作用
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作者 唐玲芳 杨永年 +2 位作者 肖杭 程健 张珍玲 《中国公共卫生学报》 1989年第4期234-235,共2页
本文就2种新合成的拟除虫菊酯对鼠伤寒沙门氏菌的诱变作用进行了探讨,提示炔戊菊酯有可能为直接诱变剂,在肝微粒体作用下迅速代谢转化而解毒。氯戊菊酯不论活化与非活化均未发生诱变作用。
关键词 诱变 菊酯 氯戊菊酯
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Research on Pesticide Residues of Cypermethrin in Lettuce
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作者 Lei LI Hanqing ZHAO Xin XU 《International Journal of Technology Management》 2015年第5期130-132,共3页
In order to find the effective method to reduce pesticide residues in vegetables, and promote the healthy development of vegetable industry. The paper used chlorothalonil, fenvalerate, dimethoate widely used pesticide... In order to find the effective method to reduce pesticide residues in vegetables, and promote the healthy development of vegetable industry. The paper used chlorothalonil, fenvalerate, dimethoate widely used pesticides as experimental material, using GC method to measure residual dynamics of vegetable pesticide. The results show that: fenvalerate, dimethoate, chlorothalonil pesticide residues in lettuce was higher than that tomato in the application day, respectively reach at 42.9%, 44.9%, 57.8%, pesticide degradation rate in open land were significantly higher than those in greenhouse within 5-20 days. The test showed that: the degradation of pesticide amount is in 8.77%r-19.64% within 1 days. The initial concentration of pesticides on vegetables are relevant with surface area of vegetable edible parts; the degradation speed of pesticide degradation rate in greenhouse vegetable is obviously slower than the open field vegetable; pesticide deposition phenomenon is an important factor affecting the pesticide residues in greenhouse. 展开更多
关键词 CYPERMETHRIN LETTUCE Analysis of pesticide residues Degradation law
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