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激光溅射电离飞行时间质谱用于不锈钢无标样半定量元素分析

何坚1, 黄荣夫2, 余泉2, 杭纬1,2, 黄本立2   

    1. 厦门大学物理与机电工程学院机电工程系,
    2. 化学化工学院化学系, 现代分析科学教育部重点实验室, 厦门 361005
  • 收稿日期:2008-08-04 修回日期:1900-01-01 出版日期:2009-01-10 发布日期:2009-01-10
  • 通讯作者: 何坚, 杭纬

Standardless Semi-quantitative Elemental Analysis of Steel Using Laser Ablation Time-of-flight Mass Spectrometry

HE Jian1*, HUANG Rong-Fu2, YU Quan2, HANG Wei1,2*, HUANG Ben-Li2   

    1. Department of Mechanical & Electrical Engineering, College of Physics and Mechanical & Electrical Engineering,
    2. Department of Chemistry, College of Chemistry and Chemical Engineering, and The Key Laboratory of Analytical Sciences of the Ministry of Education, Xiamen University, Xiamen 361005, China
  • Received:2008-08-04 Revised:1900-01-01 Online:2009-01-10 Published:2009-01-10
  • Contact: HE Jian, HANG Wei

摘要:

本文采用两套离子透镜作为离子传输系统, 发展了一种新型的激光溅射飞行时间质谱. 在优化的实验条件下对不锈钢中的各种金属元素(包括27Al, 40Ca等)都具有比较接近的灵敏度, 可用于不锈钢的无标样半定量分析.

关键词: 激光溅射, 飞行时间质谱, 无标样半定量元素分析, 不锈钢

Abstract: A small high irradiance laser ablation and ionization time-of-flight mass spectrometer with orthogonal sample introduction was described. Nearly uniform relative sensitivity coefficients as well as satisfactory resolving power(~2200) were achieved for most of metal elements. Fairly good signal stability was obtained by automated step moving of the sample stage in short time intervals. Interferences of multiply charged ions and polyatomic ions were nearly eliminated in the spectrum by utilizing helium as the buffer gas in the ion source, which resulted in a relative clean background. Standardless semi-quantitative analysis of steel was realized and the limits of detection are about 10-6 g/g for most of metal elements.

Key words: Laser ablation, Time-of-flight mass spectrometry, Standardless semi-quantitative elemental analysis, Steel

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