Laser-induced breakdown spectroscopy using laser pulses delivered by optical fibers for analyzing Mn and Ti elements in pig iron

Qingdong Zeng, Lianbo Guo, Xiangyou Li, Chao He, Meng Shen, Kuohu Li, Jun Duan, Xiaoyan Zeng, Yongfeng Lu

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

A portable fiber-optic laser-induced breakdown spectroscopy (FO-LIBS) system was developed and employed to quantitatively analyze Mn and Ti elements in pig iron. The ablated craters produced by FO-LIBS are shallower with flatter bottom surfaces as compared with those produced by a conventional LIBS system without using optical fibers to deliver the laser pulses. This is beneficial on the special occasions requiring shallower destruction. The time-resolved images of plasma plumes were obtained and compared using both LIBS systems. Plasmas with lower temperature and electron density generated by the FO-LIBS system were thinner and more uniform, which means a lower self-absorption. Using the FO-LIBS system, the coefficients of determination (R2 factors) of calibration curves for Mn and Ti elements were 0.997 and 0.998, respectively. The leave-one-out cross-validation (LOOCV) method was used to evaluate the detection accuracy. The root-mean-square errors of cross-validation (RMSECV) for Mn (concentration range 0.072-2.06 wt%) and Ti (concentration range 0.006-0.399 wt%) elements were 0.0501 and 0.0054 wt%, respectively. These results are comparable with or even slightly better than those obtained by conventional LIBS. Furthermore, the FO-LIBS system is more compact and cost effective, more suitable for harsh environments, and hence more promising for industrial applications. This journal is

Original languageEnglish (US)
Pages (from-to)403-409
Number of pages7
JournalJournal of Analytical Atomic Spectrometry
Volume30
Issue number2
DOIs
StatePublished - Feb 1 2015

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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