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Spectral Characterization of Collinear Double-Pulse Laser Induced Breakdown Spectroscopy (DP-LIBS) for the Analysis of the Chinese Traditional Medicine Artemisia annua
Analytical Letters ( IF 2 ) Pub Date : 2020-05-13 , DOI: 10.1080/00032719.2020.1761825
Jinmei Wang 1 , Xiaojuan Li 1 , Peichao Zheng 1 , Shuang Zheng 1 , Huaidong Zhao 1 , Xuefeng Mao 1 , Xiaofa Wang 1 , Chunhong Lai 1
Affiliation  

Abstract A collinear dual-pulse laser induced breakdown spectroscopy (DP-LIBS) method was employed to analyze Chinese traditional medicine Artemisia annua. The spectral intensities and signal-to-background ratios of magnesium (II) 279.54 nm, CN 388.29 nm, calcium (II) 393.37 nm, and iron (II) 404.27 nm were used to evaluate the optical emission characteristics of A. annua induced by DP-LIBS. The temporal evolution characteristics, inter-pulse time, and laser energy values were optimized. In particular, the electron density and the temperatures of the plasma were reported as functions of the delay time. The results showed that the DP-LIBS had stronger intensity and better accuracy compared to single-pulse (SP) LIBS. The enhancement factors obtained using DP-LIBS for Mg, CN, Ca, and Fe were 7.2, 8.9, 13.8, and 3.4, respectively. This study provides important information about A. annua.

中文翻译:

用于分析中药青蒿的共线双脉冲激光诱导击穿光谱 (DP-LIBS) 的光谱表征

摘要 采用共线双脉冲激光诱导击穿光谱(DP-LIBS)方法对中药青蒿进行分析。镁(II) 279.54 nm、CN 388.29 nm、钙(II) 393.37 nm和铁(II) 404.27 nm的光谱强度和信噪比用于评估A. annua的光发射特性。 DP-LIBS。优化了时间演化特性、脉冲间时间和激光能量值。特别地,将等离子体的电子密度和温度报告为延迟时间的函数。结果表明,与单脉冲(SP)LIBS相比,DP-LIBS具有更强的强度和更好的精度。使用 DP-LIBS 获得的 Mg、CN、Ca 和 Fe 的增强因子分别为 7.2、8.9、13.8 和 3.4。
更新日期:2020-05-13
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