Development of miniaturized remote laser-induced breakdown spectroscopy instrument and its application in analysis of silicon,molybdenum and chromium in alloy steel
In order to improve the flexible analysis capability of laser-induced breakdown spectroscopy(LIBS)under various extreme environments,the miniaturization design of remote LIBS instrument was re-alized in this study.The instrument adopted modular design,and the tripod head was used as base sup-port.It was applicable for the flexible detection and analysis of remote targets.8 certified reference mate-rials of alloy steel were used as the experimental subject.The spectral acquisition was carried out under the condition of 2 m.3 elements in certified reference materials,including Si,Mo and Cr,were quantitatively analyzed.The quantitative models of 3 elements were established by random forest(RF)algorithm,and the coefficients of determination were 0.999 8,0.998 8 and 0.999 1,respectively.During the model vali-dation,the minimum relative errors of predicted contents of 3 elements(Si,Mo and Cr)in validation sam-ples were 14.6％,12.9％and 11.6％,respectively.The developed miniaturized remote laser-induced breakdown spectroscopy instrument showed good remote quantitative detection capability.
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