...
  • 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 >Improving thermal desorption aerosol gas chromatography using a dual-trap design
【24h】

Improving thermal desorption aerosol gas chromatography using a dual-trap design

机译：使用双陷阱设计改善热解吸气溶胶气相色谱法

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

Thermal desorption aerosol gas chromatography (TAG) is an effective tool for in situ analysis of particulate organic molecules. However, the performance of current TAG is limited by the detectability of low volatile compounds and the matrix effect. In this study, a dual-trap TAG system was developed to address these issues. Thermally desorbed effluent is focused by a weakly retained trap (for low volatile compounds) in a 1 m capillary column conditioned in the GC oven, followed by a strongly retained trap (for high volatile compounds). Then, the focused analytes are desorbed in a reverse flow into the GC column for analysis. Detection over a wide volatility range from C10 to C40 n-alkanes is achieved using the dual-trap TAG. We show that it has lower discrimination of injection, better linearity and higher detectability of n-alkanes. The dual-trap TAG was applied for in-situ measurement of ambient fine particles (PM2.5) in Beijing. Repeatable retention time of n-alkanes was demonstrated during a continuous measurement over two weeks. (C) 2019 Elsevier B.V. All rights reserved.
机译：热解吸气溶胶气相色谱（标签）是用于颗粒状有机分子的原位分析的有效工具。然而，电流标签的性能受到低挥发性化合物和基质效应的可检测性的限制。在本研究中，开发了一种双陷阱标签系统来解决这些问题。热解吸流出物通过在GC烘箱中调节的1M毛细管柱中的弱保留捕集器（用于低挥发性化合物），然后是强保留的捕集器（用于高挥发性化合物）。然后，将聚焦的分析物中解吸成逆流到GC柱以进行分析。使用双陷阱标签实现从C10至C40正烷烃的宽波动率范围的检测。我们表明它具有较低的注射识别，更好的线性度和N-烷烃的更高可检测性。双陷阱标签应用于北京的环境微粒（PM2.5）的原位测量。在连续测量期间，在两周内连续测量来证明N-烷烃的可重复保留时间。 （c）2019 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