Multielemental self-absorption reduction in laser-induced breakdown spectroscopy by using microwave-assisted excitation

作者：Tang, Yun; Li, Jiaming; Hao, Zhongqi; Tang, Shisong; Zhu, Zhihao; Guo, Lianbo^*; Li, Xiangyou; Zeng, Xiaoyan; Duan, Jun; Lu, Yongfeng

来源：Optics Express, 2018, 26(9): 12121-12130.

DOI：10.1364/OE.26.012121

• QUANTITATIVE-ANALYSIS
• TEMPORAL EVOLUTION
• PLASMA DIAGNOSTICS
• ALUMINUM EMISSION
• LINES
• LIBS
• COEFFICIENTS
• SAMPLES
• SOILS
• RICE

The self-absorption effect seriously affects the accuracy of determination in laser-induced breakdown spectroscopy (LIBS). In this work, we proposed to reduce multielemental self-absorption within a wide spectral range (200-900 nm) by using microwave-assisted excitation in LIBS (MAE-LIBS). Self-absorption reduction of sodium (Na), potassium (K), aluminum (Al), silicon (Si), and calcium (Ca) in potassium feldspar using MAE-LIBS was investigated. The mechanisms of self-absorption reduction in MAE-LIBS were also investigated. The results show that the serious self-absorption of spectral lines (Na and K) was reduced. The full widths at half maximum (FWHMs) of Na I 589.0 nm, Na I 589.6 nm, K I 766.5 nm, and K I 769.9 nm in potassium feldspar were reduced by 43%, 43%, 53%, and 47%, respectively. MAE-LIBS also has a little FWHM reduction for spectral lines with weak self-absorption. The results demonstrate that MAE-LIBS can simultaneously reduce multielemental self-absorption.

• 出版日期2018-4-30
• 单位湖南科技学院; 华中科技大学