Copper concentrate is the main raw material for smelting copper, but some harmful elements will accelerate the damage of the smelting equipment and affect the ecological environment, and the fluorine element is one of them. The aim of the present work is to develop a method for the determination of fluorine in copper concentrate using laser-induced breakdown spectroscopy (LIBS). In this work, the CaF molecular band is proposed to replace fluorine atomic lines as the analysis target to detect the fluorine element. The calibration curves between the fluorine content and intensity of CaF molecules in copper concentrate samples (ZBK338B and ZBK340A) were established using the standard addition method, and the values of determination coefficient R² are above 0.99; the predicted relative error (RE) of fluorine in samples ZBK338B and ZBK340A was 4.13% and 4.93%, and the calculated limits of detection (LoDs) were 0.0033 wt% and 0.0052 wt% for samples ZBK338B and ZBK340A, respectively, which could meet the actual application requirements for fluorine determination in copper concentrate. This work demonstrated the feasibility of LIBS to realize reliable fluorine determination in the copper smelting industry.

中文翻译：

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使用激光诱导击穿光谱法通过 CaF 分子测定铜精矿中的氟

铜精矿是冶炼铜的主要原料，但一些有害元素会加速冶炼设备的损坏，影响生态环境，氟元素就是其中之一。本工作的目的是开发一种使用激光诱导击穿光谱 (LIBS) 测定铜精矿中氟的方法。在这项工作中，提出用CaF 分子带代替氟原子线作为检测氟元素的分析目标。采用标准加入法建立了铜精矿样品（ZBK338B和ZBK340A）中氟含量与CaF分子强度的校准曲线，确定系数R ²的值高于 0.99；ZBK338B 和 ZBK340A 样品中氟的预测相对误差 (RE) 分别为 4.13% 和 4.93%，样品 ZBK338B 和 ZBK340A 的计算检测限 (LoDs) 分别为 0.0033 wt% 和 0.0052 wt%，可以满足铜精矿中氟测定的实际应用要求。这项工作证明了 LIBS 在铜冶炼行业实现可靠的氟测定的可行性。