Determination of fluorine in copper ore using laser-induced breakdown spectroscopy assisted by the SrF molecular emission band

Zhiyang Tang, Ran Zhou, Zhongqi Hao, Wen Zhang, Qingzhou Li, Qingdong Zeng, Xiangyou Li, Xiaoyan Zeng, Yongfeng Lu

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)754-761
Number of pages8
JournalJournal of Analytical Atomic Spectrometry
Volume35
Issue number4
DOIs
StatePublished - Apr 2020

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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