共线双脉冲激光诱导击穿光谱技术检测铝合金中的Cr和Mn

杨瑞兆; 苏雪娇; 於有利; 周卫东

doi:10.11884/HPLPB201830.180053

共线双脉冲激光诱导击穿光谱技术检测铝合金中的Cr和Mn

doi: 10.11884/HPLPB201830.180053

浙江师范大学浙江省光信息检测与显示技术研究重点实验室, 浙江金华 321004

基金项目:

国家自然科学基金项目 61178034

国家自然科学基金项目 51276100

详细信息

作者简介:
杨瑞兆(1990-)，男，硕士，从事激光诱导击穿光谱技术研究；957462936@qq.com

通讯作者:
周卫东(1966-)，男，博士，研究员，目前主要从事激光光谱和飞秒激光光刻研究；wdzhou@zjnu.cn

中图分类号: O433
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出版历程
- 收稿日期: 2018-02-07
- 修回日期: 2018-05-07
- 刊出日期: 2018-09-15

Double pulse laser-induced breakdown spectroscopy analysis of trace elements Cr and Mn in aluminum alloy

Key Laboratory of Optical Information Detection and Display Technology of Zhejiang, Zhejiang Normal University, Jinhua 321004, China

摘要

摘要: 采用两台波长1064 nm的调Q脉冲Nd ∶YAG激光器和多通道小型光纤光栅光谱仪，建立了一套共线双脉冲激光诱导击穿光谱分析装置。与单脉冲激光诱导技术相比，在最佳双脉冲时间延时8 μs时，Mn I 403.07 nm和Cr I 425.43 nm的光谱强度分别增加了14.3倍和17.2倍，以这两条谱线为分析线，铝合金中Mn和Cr的检测限分别由单脉冲时的73和94.5 μg/g降低至双脉冲时的3.76和4.26 μg/g，检测灵敏度提高了约20倍。
- 激光诱导击穿光谱 /
- 铝合金 /
- 检测限 /
- 灵敏度
Abstract: An experimental apparatus, which consists of two identical pulsed 1064 nm Nd: YAG lasers and a portable spectrometer, has been built for element analysis in aluminum alloy in collinear dual pulse laser induced breakdown spectroscopy (DP-LIBS) configuration. 14.3- and 17.2-fold enhanced line intensities have been observed for Mn I 403.07 nm and Cr I 425.43 nm respectively, compared to that of single-pulse laser induced breakdown spectroscopy. Based on the signal intensity enhancement, inter pulse delay time has been carefully optimized, which gives a value of about 8-9 μs. Using this collinear dual pulse laser induced breakdown spectroscopy apparatus, the calibration curves for quantitative measurement of Mn and Cr were derived, and the limits of detection for elements Mn and Cr are found to be 3.76 and 4.26 μg/g, respectively.
- DP-LIBS /
- aluminum alloy /
- limit of detection /
- sensitivieness

HTML全文

图 1 共线双脉冲激光诱导击穿光谱装置示意图

Figure 1. Schematic diagram of DP LIBS system

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图 2 Cr I 425.43 nm & Mn I 403.07 nm谱线强度与双脉冲延时关系图(E=30 mJ+30 mJ)

Figure 2. Intensities of Cr I 425.43 nm & Mn I 403.07 nm as a function of inter-pulse delay time. (E=30 mJ+30 mJ)

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图 3 单脉冲(E=60 mJ)和双脉冲(E=30 mJ+30 mJ, t_d=8 μs) LIBS光谱

Figure 3. Spectrum of SP-LIBS and DP-LIBS

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图 4 Cr I 425.43 nm & Mn I 403.07 nm元素的定标曲线

Figure 4. The calibration curve for Cr I 425.43 nm and Mn I 403.07 nm

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