• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of mass spectrometry: JMS >A small high-irradiance laser ionization time-of-flight mass spectrometer
【24h】

A small high-irradiance laser ionization time-of-flight mass spectrometer

机译：小型高辐射激光电离飞行时间质谱仪

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 small high-irradiance laser ionization time-of-flight mass spectrometer (LI-TOFMS) with orthogonal sample introduction was described. High irradiance of 6 x 10(10) W/cm(2) at 532 nm from a Nd : YAG laser was applied in the experiment to get a high ionization degree in plasma and to dissociate the interferential polyatomic ions. Meanwhile, the interferential multiply charged ions resulted by high-irradiance were nearly eliminated in the spectrum by utilizing helium as the buffer gas in the ion source due to three-body recombination, which resulted in a relatively clean background. Improved signal stability was obtained by automated step moving of the sample stage in short time intervals. By using two sets of Einzel lens in transport system, nearly uniform relative sensitivity coefficients (RSCs) were achieved for most of metal elements including light ions which were detected in extremely low sensitivity in previous hexapole transportation instrument. The resolving power reaches 2200, and the detection limits (DLs) are 10(-6) g/g for metal elements in the steel standard.
机译：描述了带有正交样品引入的小型高辐射激光电离飞行时间质谱仪（LI-TOFMS）。在Nd：YAG激光器中，在532 nm处具有6 x 10（10）W / cm（2）的高辐照度，用于在等离子体中获得高电离度并解离干扰性多原子离子。同时，由于三体复合，利用氦气作为离子源中的缓冲气体，在光谱中几乎消除了高辐照度产生的干扰性多电荷离子，从而产生了相对干净的背景。通过在较短的时间间隔内自动移动样品台，可以获得更好的信号稳定性。通过在运输系统中使用两组Einzel透镜，可以对大多数金属元素（包括光离子）获得几乎统一的相对灵敏度系数（RSC），而在以前的六极杆运输工具中，这种灵敏度极低。分辨力达到2200，钢标准中金属元素的检出限（DLs）为10（-6）g / g。

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