The Research for Quantitative Analysis of Iron in Myanmar Jades Using Laser Induced Breakdown Spectroscopy
WANG Ya-jun1, YUAN Xin-qiang1, SHI Bin1*, SHI Mei-yu1, ZHANG Qian1, CHEN Tao1, 2
1. Gemological Institute of China University of Geosciences, Wuhan 430074, China
2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
Abstract：Using laser-induced breakdown spectroscopy (LIBS), quantitative analysis of iron(Fe)in Myanmar jades has been studied in this work. Ion’s LIBS spectrum at 275.57 nm was chosen for quantitative spectral analysis, and Silicon’s LIBS spectrum at 288.17 nm was selected as internal standard line. Twelve pieces of jade from Myanmar were selected as specimens. Nine of them were applied to construct the spectral calibration curves of iron with traditional method and internal standard method, and the content of iron in another three specimens selected as test samples was practically predicted. The experimental results show that the relative standard deviation of the intensity of iron is between 1.4% and 8.3%, while the fitting correlation (R2) of calibration curve is 0.979, and the maximum relative error of test samples is 10.6% when traditional method is used. While the internal standard method was used, the relative standard deviation of the intensity ratio of iron and silicon is between 0.9% and 5.7%, while the fitting correlation (R2) of calibration curve is 0.989, and the relative error of test samples reduces to under 7%. The analyzed results indicate that using LIBS coupled with internal standard method is much better to quantitatively analyze the content of iron in Myanmar jades compared with applying traditional method, as internal standard method can reduce the relative error of measurement.
Key words：Myanmar jades; LIBS; Spectral analysis; Traditional method; Internal standard method
王亚军，袁心强，石 斌，石美钰，张 倩，陈 涛. 缅甸翡翠中铁元素的激光诱导击穿光谱定量检测[J]. 光谱学与光谱分析, 2018, 38(01): 263-266.
WANG Ya-jun, YUAN Xin-qiang, SHI Bin, SHI Mei-yu, ZHANG Qian, CHEN Tao. The Research for Quantitative Analysis of Iron in Myanmar Jades Using Laser Induced Breakdown Spectroscopy. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(01): 263-266.
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