A comparative study of laser-induced breakdown spectroscopy (LIBS) with spatially resolved single- and double-pulse configurations is performed to investigate the capability of simultaneous multi-element detection in aluminum-based alloys. The spatially resolved technique is used to obtain the LIBS spectra at 6 different positions along the plume expansion (axial) direction. The experimental parameters, including delay time, inter-pulse delay time and gate width, are optimized to achieve sensitive elemental detection. Under these optimized conditions, the limits of detection for Fe, Cu, Mg, Mn, Zn, Sn, Pb, Ni, Ti, Cr, Sr and Ca are obtained with the single- and double-pulse configurations. It is observed that an improvement of the detection capability is achieved in the spatially resolved double-pulse experiments. Moreover, the dependence of the limits of detection on the selection of atomic and ionic lines is discussed.

中文翻译：

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空间分辨单脉冲和双脉冲激光诱导击穿光谱法测定铝基合金的检出限

对具有空间分辨的单脉冲和双脉冲配置的激光诱导击穿光谱法（LIBS）进行了比较研究，以研究铝基合金中同时进行多元素检测的能力。使用空间分辨技术来获得沿羽状膨胀（轴向）方向在6个不同位置的LIBS光谱。优化了实验参数，包括延迟时间，脉冲间延迟时间和栅极宽度，以实现灵敏的元素检测。在这些优化条件下，使用单脉冲和双脉冲配置可获得Fe，Cu，Mg，Mn，Zn，Sn，Pb，Ni，Ti，Cr，Sr和Ca的检出限。观察到，在空间分辨双脉冲实验中实现了检测能力的提高。而且，