The widely applied copper metal is mainly produced by smelting copper ore, in which fluorine (F) is one of the harmful elements. Therefore, the F content has become a mandatory test index for copper ore. The low excitation efficiency, complex and serious spectral interference makes it difficult to detect F element in copper ore using atomic emission spectroscopy of laser-induced breakdown spectroscopy (LIBS). To address this issue, SrF molecular emission bands were investigated to improve the analytical capabilities of LIBS for the determination of trace F in copper ore. The results demonstrated that the SrF molecular emission band produces a significantly accurate calibration model (R² = 0.9933), with high detection sensitivity (5 ppm), high analytical accuracy (RMSECV = 0.0049 wt%), and high analytical precision (6.64 wt%) for detection of F in copper ore. SrF molecular emission bands in LIBS show great potential for F determination in the copper ore industry. Furthermore, the mechanism behind the emission spectrum for the SrF molecule was also discussed.

中文翻译：

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SrF分子发射谱带辅助的激光诱导击穿光谱法测定铜矿石中的氟

广泛使用的铜金属主要是通过熔炼铜矿石生产的，其中氟（F）是有害元素之一。因此，F含量已成为铜矿石的强制性测试指标。低激发效率，复杂且严重的光谱干扰使得难以使用激光诱导击穿光谱法（LIBS）的原子发射光谱法检测铜矿石中的F元素。为了解决这个问题，研究了SrF分子发射谱带，以提高LIBS的测定铜矿石中痕量F的分析能力。结果表明，SrF分子发射谱带可产生非常准确的校准模型（R ²= 0.9933），高检测灵敏度（5 ppm），高分析精度（RMSECV = 0.0049 wt％）和高分析精度（6.64 wt％）用于检测铜矿石中的F. LIBS中的SrF分子发射谱带显示了在铜矿石工业中测定F的巨大潜力。此外，还讨论了SrF分子发射光谱背后的机理。