Abstract An instrument combining laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy was developed for the in situ atomic and molecular composition analysis of minerals. The apparatus consists of an optical system, a sample chamber, a spectrometer for Raman and another for LIBS, as well as a control system equipped with laboratory-written software. Gypsum, calcite, prehnite, pearl, lazurite, and several mixtures of NaBr and CaCO3 were selected as samples for evaluation of the performance of the instrument. Sulfate, carbonate, silicate, and crystalline water were identified and different structures of CaCO3 were clearly distinguished by the use of a Gaussian fit. The limit of detection for CaCO3 in a NaBr mixture was 5.7 mg/g by Raman. LIBS was employed to determine calcium, magnesium, iron, sodium, aluminum, and carbon with the newly developed system. The limits of detection obtained for Ca, Na, and C were 90.2 μg/g, 84.6 μg/g, and 2.5 mg/g, respectively. The experimental results from commercial Raman spectroscopy instruments were used to verify and support the measurements from this novel instrument.

中文翻译：

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用于矿物原位原子和分子分析的激光诱导击穿光谱和拉曼光谱的新型组合仪器

摘要 研制了一种结合激光诱导击穿光谱（LIBS）和拉曼光谱的仪器，用于矿物原位原子和分子组成分析。该仪器包括一个光学系统、一个样品室、一个用于拉曼和另一个用于 LIBS 的光谱仪，以及一个配备有实验室编写的软件的控制系统。选择石膏、方解石、葡萄石、珍珠、天青石以及几种 NaBr 和 CaCO3 的混合物作为样品来评估仪器的性能。硫酸盐、碳酸盐、硅酸盐和结晶水被识别出来，并且通过使用高斯拟合可以清楚地区分 CaCO3 的不同结构。拉曼对 NaBr 混合物中 CaCO3 的检测限为 5.7 mg/g。LIBS 用于测定钙、镁、铁、钠、铝、和碳与新开发的系统。Ca、Na 和 C 的检测限分别为 90.2 μg/g、84.6 μg/g 和 2.5 mg/g。商业拉曼光谱仪器的实验结果用于验证和支持这种新型仪器的测量。