This study developed a reliable laser‐induced breakdown spectroscopy (LIBS) screening approach capable of detecting GSR in just a few minutes with minimal damage to the sample, high specificity, and sensitivity. Moreover, a novel micro‐sampling method was developed to gather three‐dimensional data of the simultaneous occurrence of IGSR markers from a discrete space. The method is capable of micro‐spatial chemical analysis from just two laser shots fired at an area of 100‐μm diameter. The performance of the micro‐spot method is compared with our previously published bulk‐line method. Superior accuracy, spatial information of IGSR distribution in the sample, and a less invasive sampling are some of the advantages of the newly proposed method. A benefit afforded by this approach is the use of the universal hand's collection method currently used by practitioners, while leaving over 99% of the stub left unaltered for further analysis.

中文翻译：

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用于无机枪弹残留物微空间化学分析的新型LIBS方法

这项研究开发了一种可靠的激光诱导击穿光谱 (LIBS) 筛选方法，能够在几分钟内检测到 GSR，对样品的损害最小，具有高特异性和灵敏度。此外，还开发了一种新的微采样方法来从离散空间收集同时出现的 IGSR 标记的三维数据。该方法能够对直径为 100 微米的区域发射的两次激光进行微空间化学分析。微点法的性能与我们之前发表的批量线法进行了比较。较高的精度、样本中 IGSR 分布的空间信息以及侵入性较小的采样是新提出的方法的一些优点。这种方法提供的好处是使用万能手'