Abstract
A multi-line internal standard calibration method is proposed for the
quantitative analysis of carbon steel using laser-induced breakdown spectroscopy (LIBS).
A procedure based on the method was adopted to select the best calibration curves and
the corresponding emission lines pairs automatically. Laser-induced breakdown
spectroscopy experiments with carbon steel samples were performed, and C, Cr, and Mn
were analyzed via the proposed method. Calibration curves of these elements were
constructed via a traditional single line internal standard calibration method and a
multi-line internal standard calibration method. The calibration curves obtained were
evaluated with the determination coefficient, the root mean square error of
cross-validation, and the average relative error of cross-validation. All of the
parameters were improved significantly with the proposed method. The results show that
accurate and stable calibration curves can be obtained efficiently via the multi-line
internal standard calibration method.
© 2016 The Author(s)
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