...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Analytical Toxicology >Cypermethrin residues determination in the milk of a lactating dairy cow by gas chromatography-ion trap mass spectrometry.
【24h】

Cypermethrin residues determination in the milk of a lactating dairy cow by gas chromatography-ion trap mass spectrometry.

机译：气相色谱-离子阱质谱法测定泌乳奶牛牛奶中的氯氰菊酯残留量。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of this work was to detect and quantitate residues of the pyrethroid insecticide cypermethrin in the milk of a lactating dairy cow. The efficiency of the method was settled through recovery experiments in which certain amounts of the pyrethroid cypermethrin were spiked up to milk. For this purpose, the matrix solid-phase dispersion method was applied followed by clean-up with silica-gel column. The extracts obtained were analyzed by gas chromatography-ion trap mass spectrometry. With the aid of the selected ion storage technique, it was feasible to select specific ions from the analyte of interest, which could be separated from the organic matrix. After the establishment of optimum conditions for the detection of pyrethroid residues of cypermethrin, samples of milk were collected from a cow submitted to a veterinary treatment for elimination of parasites using an insecticide with 50 g/L of active ingredient in its formula. The data obtained showed milk contamination with a maximum concentrationof 0.168 mg/kg 24 h after insecticide treatment. Considering the maximum residual limit for cypermethrin in milk of 0.010 mg/kg, samples collected 15 and 24 h after treatment showed concentrations about 16 times above this value, and samples collected 11 days after treatment showed concentrations about 7 times above this value. Seventeen days after treatment, cypermethrin was not detected in the milk.
机译：这项工作的目的是检测和定量泌乳奶牛乳汁中拟除虫菊酯类杀虫剂氯氰菊酯的残留。通过回收实验确定了该方法的效率，在回收实验中，将一定量的拟除虫菊酯氯氰菊酯掺入了牛奶中。为此，采用了基质固相分散法，然后用硅胶柱进行了纯化。通过气相色谱-离子阱质谱法分析获得的提取物。借助所选的离子存储技术，从目标分析物中选择特定离子是可行的，这些特定离子可以与有机基质分离。在建立了检测氯氰菊酯的拟除虫菊酯残留的最佳条件后，从一头奶牛中收集牛奶样品，该奶牛经过兽医处理以使用配方中含有50 g / L活性成分的杀虫剂消除寄生虫。所获得的数据显示，杀虫剂处理24小时后，牛奶污染的最大浓度为0.168 mg / kg。考虑到氯氰菊酯在牛奶中的最大残留限量为0.010 mg / kg，处理后15和24小时收集的样品显示浓度比该值高约16倍，处理11天后收集的样品显示浓度比该值高约7倍。治疗后十七天，牛奶中未检出氯氰菊酯。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号