...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Comparison of liquid chromatography using triple quadrupole and quadrupole ion trap mass analyzers to determine pesticide residues in oranges
【24h】

Comparison of liquid chromatography using triple quadrupole and quadrupole ion trap mass analyzers to determine pesticide residues in oranges

机译：使用三重四极杆和四极杆离子阱质谱分析仪比较液相色谱法测定橘子中的农药残留

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

Liquid chromatography-triple quadrupole/mass spectrometry (LC-TQ/MS) and liquid chromatography-quadrupole ion trap/mass spectrometry (LC-QIT/MS) for determining bupirimate, hexaflumuron, tebufenpyrad, buprofezin, pyriproxyfen, and fluvalinate in fruits have been compared. The differences in the mass spectra obtained by triple and ion trap quadrupoles are discussed, showing how both of them provide interesting features. The evaluation of the two instruments was carried out by ethyl acetate extraction of oranges spiked with the studied pesticides at LOQ and 10 times the LOQ. Results obtained by LC-TQ/MS correlated well with those obtained by LC-QIT/MS. Recoveries were 70-94% by LC-TQ/MS and 72-92% by LC-QIT/MS with the R.S.D. from five replicate analysis 4-14% and 8-18%, respectively. Matrix effects were tested for both techniques by standard addition to blank extracts. Although the matrix effects are not originated in mass analyzer but in the LC/MS interface, they were, generally, more marked by LC-QIT-MS than by LC-TQ/MS. The limits of quantification (LOQs) were 0.005-0.2 mg kg(-1) by both equipments-appropriate values for determining these pesticides in orange from the regulatory point of view. The results indicate that the TQ provides higher precision, better linearity, it is more robust, and when the purpose of the analysis is quantitative determination, preferable over the QIT. However, the application of both mass spectrometers to analyze orange samples conventionally treated showed that any can be used for qualitative and quantitative purposes. (c) 2004 Elsevier B.V. All rights reserved.
机译：液相色谱-三重四极杆/质谱（LC-TQ / MS）和液相色谱-四极杆离子阱/质谱（LC-QIT / MS）用于测定水果中的丁二酸，六氟尿嘧啶，替布芬吡拉，丁丙非嗪，吡吡氧芬和氟维林酸酯比较。讨论了由三重和离子阱四极杆获得的质谱差异，显示了它们如何提供有趣的功能。两种仪器的评估是通过乙酸乙酯提取的桔子（其中混合了所研究农药的LOQ值和LOQ值的10倍）进行的。通过LC-TQ / MS获得的结果与通过LC-QIT / MS获得的结果具有很好的相关性。采用R.S.D的LC-TQ / MS回收率为70-94％，LC-QIT / MS回收率为72-92％。来自五次重复分析的4-14％和8-18％。通过标准添加到空白提取物中来测试两种技术的基质效果。虽然基质效应不是起源于质量分析仪，而是起源于LC / MS界面，但通常，与LC-TQ / MS相比，LC-QIT-MS对基质的影响更大。通过两种设备的适当值，从监管的角度确定橙中的这些农药，定量极限（LOQ）为0.005-0.2 mg kg（-1）。结果表明，TQ可提供更高的精度，更好的线性度，更鲁棒，并且当分析的目的是定量确定时，优于QIT。但是，使用两种质谱仪分析常规处理的橙色样品都表明，任何一种都可以用于定性和定量目的。 （c）2004 Elsevier B.V.保留所有权利。

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