利用激光诱导击穿光谱结合激光诱导荧光法测定低合金钢中的钴

Determination of cobalt in low-alloy steels using laser-induced breakdown spectroscopy combined with laser-induced fluorescence.

作者信息

Li Jiaming, Guo Lianbo, Zhao Nan, Yang Xinyan, Yi Rongxing, Li Kuohu, Zeng Qingdong, Li Xiangyou, Zeng Xiaoyan, Lu Yongfeng

机构信息

Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China.

出版信息

Talanta. 2016 May 1;151:234-238. doi: 10.1016/j.talanta.2016.01.023. Epub 2016 Jan 13.

DOI:10.1016/j.talanta.2016.01.023

PMID:26946032

Abstract

Cobalt element plays an important role for the properties of magnetism and thermology in steels. In this work, laser-induced breakdown spectroscopy combined with laser-induced fluorescence (LIBS-LIF) was studied to selectively enhance the intensities of Co lines. Two states of Co atoms were resonantly excited by a wavelength-tunable laser. LIBS-LIF with ground-state atom excitation (LIBS-LIFG) and LIBS-LIF with excited-state atom excitation (LIBS-LIFE) were compared. The results show that LIBS-LIFG has analytical performance with LoD of 0.82μg/g, R(2) of 0.982, RMSECV of 86μg/g, and RE of 9.27%, which are much better than conventional LIBS and LIBS-LIFE. This work provided LIBS-LIFG as a capable approach for determining trace Co element in the steel industry.

摘要

钴元素对钢的磁性和热学性能起着重要作用。在本工作中，对激光诱导击穿光谱结合激光诱导荧光（LIBS-LIF）进行了研究，以选择性增强钴谱线的强度。钴原子的两个态被波长可调谐激光共振激发。比较了基态原子激发的LIBS-LIF（LIBS-LIFG）和激发态原子激发的LIBS-LIF（LIBS-LIFE）。结果表明，LIBS-LIFG具有分析性能，其检测限为0.82μg/g，决定系数R(2)为0.982，交叉验证均方根误差RMSECV为86μg/g，相对误差RE为9.27%，远优于传统LIBS和LIBS-LIFE。本工作提供了LIBS-LIFG作为钢铁行业中测定痕量钴元素的一种有效方法。