Laser-induced breakdown spectroscopy in a metal-seeded flame

Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022) Pub Date : 2000-07-24 DOI:10.1109/IECEC.2000.870819

Hansheng Zhang, F. Yueh, J. Singh, R.L. Cook, G.W. Loge

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引用次数: 4

Abstract

Laser-induced breakdown spectroscopy (LIBS) has been used to detect atomic and molecular species in various environments. It has the capability to be used as a real time monitor in a harsh and turbulent environment. LIBS has been tested at the Diagnostic Instrumentation and Analysis Laboratory's (DIAL) combustion facility to optimize and characterize the LIBS operation in a flame. Three metals, Cu, Fe, and Ca, were injected into the combustor with a peristaltic pump. LIBS spectra were recorded at different delay times with a fixed gate width to determine the best detection gate. LIBS signal in the flame were also compared with the direct emission from the flame. It is found that the LIBS signal is stronger than the signal from the direct emission of the metal in the same flame and the LIBS method has a much better signal over background ratio. To test the calibration scheme, metal solutions were injected into the combustor with different rates. Linear calibration curves were obtained.

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金属种子火焰中的激光诱导击穿光谱

激光诱导击穿光谱(LIBS)已被用于检测各种环境中的原子和分子种类。它具有在恶劣和动荡的环境中作为实时监视器使用的能力。LIBS已经在诊断仪器和分析实验室(DIAL)的燃烧设备上进行了测试，以优化和表征LIBS在火焰中的操作。通过蠕动泵将铜、铁、钙三种金属注入燃烧室。在固定栅极宽度下记录不同延迟时间的LIBS光谱，以确定最佳检测栅极。并将火焰中的LIBS信号与火焰直接发射的LIBS信号进行了比较。结果表明，LIBS方法的信号比同一火焰中金属直接发射的信号强，具有更好的信号比。为了测试校准方案，以不同的速率向燃烧室注入金属溶液。得到了线性校准曲线。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022)

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