• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of mass spectrometry >Development and characterization of an ion trap mass spectrometer for the on-line chemical analysis of atmospheric aerosol particles
【24h】

Development and characterization of an ion trap mass spectrometer for the on-line chemical analysis of atmospheric aerosol particles

机译：用于大气气溶胶颗粒在线化学分析的离子阱质谱仪的开发与表征

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

A novel Ion Trap Aerosol Mass Spectrometer (IT-AMS) for atmospheric particles has been developed and characterized. With this instrument the chemical composition of the non-refractory component of aerosol particles can be measured quantitatively. The set-up makes use of the well-characterized inlet and vaporization/ionization system of the Aerodyne Aerosol Mass Spectrometer (AMS). While the AMS uses either a linear quadrupole mass filter (Q-AMS) or a time-of-flight mass spectrometer (ToF-AMS) as the mass analyzer, the IT-AMS utilizes a three-dimensional quadrupole ion trap. The main advantages of an ion trap are the possibility of performing MSn-experiments as well as ion/molecule reaction studies. The mass analyzer has been built in-house together with major components of the electronics. The IT-AMS is operated under full PC control and can be used as a field instrument due to its compact size. A detailed description of the set-up is presented. Experiments show that a mass resolving power larger than 1500 can be reached. This value is high enough to separate different organic species at m/z 43. Calibrations with laboratory-generated aerosol particles indicate a linear relationship between signal response and aerosol mass concentration. These studies, together with estimates of the detection limits for particulate sulfate (0.65 mu g/m(3) 3) and nitrate (0.16 mu g/m(3)) demonstrate the suitability of the IT-AMS to measure atmospheric aerosol particles. An inter-comparison between the IT-AMS and a Q-AMS for nitrate in urban air yields good agreement. For laboratory-generated polystyrene latex particles a MS/MS-study using collision-induced dissociation (CID) with a daughter/parent ion yield of more than 60% has been performed. In the future, similar MS/MS-studies can be conducted for atmospheric particles and for the study of secondary aerosol formation in smog chamber experiments. (c) 2007 Elsevier B.V. All rights reserved.
机译：已经开发出了一种新型的用于大气颗粒的离子阱气溶胶质谱仪（IT-AMS）。利用该仪器，可以定量地测量气溶胶颗粒的非耐火成分的化学组成。该设置利用了Aerodyne气溶胶质谱仪（AMS）的特征明确的入口和汽化/电离系统。 AMS使用线性四极杆质谱过滤器（Q-AMS）或飞行时间质谱仪（ToF-AMS）作为质量分析仪，而IT-AMS使用三维四极杆离子阱。离子阱的主要优点是可以进行MSn实验以及进行离子/分子反应研究。质量分析器已与电子设备的主要组件一起在内部制造。 IT-AMS在完全PC的控制下运行，并且由于其紧凑的尺寸而可用作现场仪器。介绍了该设置的详细说明。实验表明，可以达到大于1500的质量分辨能力。该值足够高，可以在m / z 43时分离出不同的有机物。用实验室生成的气溶胶颗粒进行的校准表明，信号响应与气溶胶质量浓度之间存在线性关系。这些研究以及对硫酸盐颗粒（0.65μg/ m（3）3）和硝酸盐（0.16μg/ m（3））的检出限的估计值证明了IT-AMS用于测量大气气溶胶颗粒的适用性。 IT-AMS和Q-AMS在城市空气中硝酸盐之间的相互比较产生了很好的一致性。对于实验室生成的聚苯乙烯胶乳颗粒，已进行了使用碰撞诱导解离（CID）且子/母离子产率超过60％的MS / MS研究。将来，可以对大气颗粒进行类似的MS / MS研究，并在烟雾室实验中研究次级气溶胶的形成。 （c）2007 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