Abstract The objective of this work is to present a novel procedure based on the time resolved Boltzmann plot, and the Calibration-free Laser Induced Breakdown Spectroscopy techniques, to determine the composition of the samples by exploiting the temporal evolution of the spectral lines generated in the laser-produced plasma. As an example of the application of this procedure, Laser Induced Breakdown Spectroscopy spectra were acquired on binary lead – tin alloys of different composition at several delay times, from 1 to 4 μs with a step of 0.5 μs after the onset of the plasma. The matrix change of the alloys was studied through the determination of the constants that characterize the temporal evolution of plasma. The effects of self-absorption were also taken into account and compensated. The application of the proposed method allowed us to determine the concentrations of lead (Pb) and tin (Sn) in the alloys with an error lower than 5%.

中文翻译：

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使用基于免校准激光诱导击穿光谱的新方法研究二元铅锡合金

摘要 这项工作的目的是提出一种基于时间分辨玻尔兹曼图和免校准激光诱导击穿光谱技术的新程序，通过利用在样品中产生的谱线的时间演变来确定样品的成分。激光产生的等离子体。作为该程序应用的一个示例，激光诱导击穿光谱在不同成分的二元铅锡合金上获得了几个延迟时间，从 1 到 4 μs，在等离子体开始后的步长为 0.5 μs。通过确定表征等离子体随时间演变的常数来研究合金的基体变化。自吸收的影响也被考虑在内并得到补偿。