High-precision in situ analysis of the lead isotopic composition in copper using femtosecond laser ablation MC-ICP-MS and the application in ancient coins

• Published in: Guang pu xue yu guang pu fen xi Vol. 33; no. 5; p. 1342
• Main Authors: Chen, Kai-Yun, Fan, Chao, Yuan, Hong-Lin, Bao, Zhi-An, Zong, Chun-Lei, Dai, Meng-Ning, Ling, Xue, Yang, Ying
• Format: Journal Article
• Language: Chinese
• Published: China 01.05.2013
• ISSN: 1000-0593
• DOI: 10.3964/j.issn.1000-0593(2013)05-1342-08

In the present study we set up a femtosecond laser ablation MC-ICP-MS method for lead isotopic analysis. Pb isotopic composition of fifteen copper (brass, bronze) standard samples from the National Institute of Standards Material were analyzed using the solution method (MC-ICP-MS) and laser method (fLA-MC-ICPMS) respectively, the results showed that the Pb isotopic composition in CuPb12 (GBW02137) is very homogeneous, and can be used as external reference material for Pb isotopic in situ analysis. On CuPb12 112 fLA-MC-ICPMS Pb isotope analysis, the weighted average values of the Pb isotopic ratio are in good agreement with the results analyzed by bulk solution method within 2sigma error, the internal precision RSEs of the 208 Pb/204 Pb ratio and 207 Pb/206 Pb ratio are less than 90 and 40 ppm respectively, and the external precision RSDs of them are less than 60 and 30 ppm respectively. Pb isotope of thirteen ancient bronze coins was analyzed via fLA-MC-ICPMS, the results showed that the Pb isotopic compositi