Spectroscopy and Spectral Analysis, Volume. 38, Issue 5, 1552(2018)
Trace Titanium in Ferroalloy Studied by the Laser Induced Breakdown Spectroscopy
The concentration of titanium element in the ferroalloys was measured by laser induced breakdown spectroscopy. The maximum spectral signals were observed at the output energy of pulse laser at 50 mJ and the delay at 1 μs. Under this circumstance, traditional calibration method (TCM) and internal standard method (ISM) with Fe Ⅰ 43835 nm and Fe Ⅰ 42712 nm lines were used to quantitatively analyze the Ti in iron alloy. The fitting correlation coefficients (r) of ISM were 0997 8 and 0993 9 for Fe Ⅰ 43835 nm and Fe Ⅰ 42712 nm respectively, higher than that of TCM (0956 3). This paper presented a double-line average internal standard method and resulted in 0998 4 for r. In the range of Ti concentration from 0063% to 19%, the relative errors were 237% and 60% for the TCM and ISM respectively. However, the relative error was reduced to 39% by the double-line average internal standard method. In addition, the temperature of plasma Ti was 6 6543 K and the electron density was 1072×1022 cm-3 through calculating the obtaining lines of Ti at the laser energy of 50 mJ. Furthermore, the relationship between the laser energy and the plasma temperature was discussed in the paper.
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JIA Hao-yue, LI Chuang-liang, YIN Xu-mei, ZHOU Rui, QIU Xuan-bing, YANG Wen, LI Kun, WANG Gao, WEI Ji-lin. Trace Titanium in Ferroalloy Studied by the Laser Induced Breakdown Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2018, 38(5): 1552
Received: May. 15, 2017
Accepted: --
Published Online: Jun. 1, 2018
The Author Email: Hao-yue JIA (326030358@qq.com)