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Accurate sulfur determination of coal using double-pulse laser-induced breakdown spectroscopy
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020-05-16 , DOI: 10.1039/c9ja00448c Yiwen Ma 1, 2, 3, 4 , Wen Zhang 1, 2, 3, 4 , Zhang Xiong 1, 2, 3, 4 , Haohao Cui 1, 2, 3, 4 , Qingzhou Li 1, 2, 3, 4 , Ran Zhou 1, 2, 3, 4 , Youjian Zhang 1, 2, 3, 4 , Xiangyou Li 1, 2, 3, 4 , Xiaoyan Zeng 1, 2, 3, 4 , Qing Li 4, 5, 6
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020-05-16 , DOI: 10.1039/c9ja00448c Yiwen Ma 1, 2, 3, 4 , Wen Zhang 1, 2, 3, 4 , Zhang Xiong 1, 2, 3, 4 , Haohao Cui 1, 2, 3, 4 , Qingzhou Li 1, 2, 3, 4 , Ran Zhou 1, 2, 3, 4 , Youjian Zhang 1, 2, 3, 4 , Xiangyou Li 1, 2, 3, 4 , Xiaoyan Zeng 1, 2, 3, 4 , Qing Li 4, 5, 6
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Sulfur accurate determination plays a vital role in the evaluation of coal quality. In this work, double-pulse laser-induced breakdown (DP-LIBS) in a helium atmosphere was presented and applied in the sulfur concentration quantification of coal. The ablation plasma generated from the sample surface by the first laser (Nd:YAG laser at 1064 nm, 50 mJ per pulse) was re-excited orthogonally by the second laser pulse (Nd:YAG laser at 1064 nm, 120 mJ per pulse). The intensity of sulfur spectral lines has been enhanced with DP-LIBS and the interference from O I 926.6 has been weakened in the helium atmosphere. The calibration curves of S I 921.3 nm, S I 922.8 nm and S I 923.8 nm have been established for 10 coal samples with S concentration ranging from 0.28 wt% to 4.01 wt%. The best result was achieved with R2 = 0.992, LoD = 0.038 wt%, and RMSECV = 0.143 wt%. The overall results adequately demonstrate that DP-LIBS combined with a helium atmosphere has excellent analytical performance for sulfur determination in coal and enormous potential for on-line detection in the coal industry.
中文翻译：
使用双脉冲激光诱导击穿光谱法准确测定煤中的硫
硫的准确测定在评估煤质中起着至关重要的作用。在这项工作中，提出了在氦气氛中的双脉冲激光诱导击穿（DP-LIBS）并将其应用于煤中硫的浓度定量。由第一激光（1064 nm的Nd：YAG激光，每个脉冲50 mJ）从样品表面产生的消融等离子体被第二激光脉冲（1064 nm的Nd：YAG激光，每个脉冲120 mJ）正交激发。 。DP-LIBS增强了硫谱线的强度，并且在氦气氛中减弱了来自OI 926.6的干扰。已经建立了10个煤样品的SI 921.3 nm，SI 922.8 nm和SI 923.8 nm的校准曲线，其S浓度为0.28 wt％至4.01 wt％。R 2获得了最佳结果= 0.992，LoD = 0.038 wt％，RMSECV = 0.143 wt％。总体结果充分证明，DP-LIBS结合氦气气氛对煤炭中的硫含量测定具有出色的分析性能，并且在煤炭行业中具有在线检测的巨大潜力。
更新日期：2020-07-08
中文翻译：
使用双脉冲激光诱导击穿光谱法准确测定煤中的硫
硫的准确测定在评估煤质中起着至关重要的作用。在这项工作中，提出了在氦气氛中的双脉冲激光诱导击穿（DP-LIBS）并将其应用于煤中硫的浓度定量。由第一激光（1064 nm的Nd：YAG激光，每个脉冲50 mJ）从样品表面产生的消融等离子体被第二激光脉冲（1064 nm的Nd：YAG激光，每个脉冲120 mJ）正交激发。 。DP-LIBS增强了硫谱线的强度，并且在氦气氛中减弱了来自OI 926.6的干扰。已经建立了10个煤样品的SI 921.3 nm，SI 922.8 nm和SI 923.8 nm的校准曲线，其S浓度为0.28 wt％至4.01 wt％。R 2获得了最佳结果= 0.992，LoD = 0.038 wt％，RMSECV = 0.143 wt％。总体结果充分证明，DP-LIBS结合氦气气氛对煤炭中的硫含量测定具有出色的分析性能，并且在煤炭行业中具有在线检测的巨大潜力。
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