Determination of Hf-Sr-Nd isotopic ratios by MC-ICP-MS using rapid acid digestion after fl

Determination of Hf-Sr-Nd isotopic ratios by MC-ICP-MS using rapid acid digestion after flux-free

fusion in geological materials

Zhian Bao;Chunlei Zong;Linru Fang;Honglin Yuan;Kaiyun Chen;Mengning Dai

【期刊名称】《中国地球化学学报（英文版）》 【年(卷),期】2018(037)002

【摘要】In this study,we established a rapid acid digestion for determining Hf-Sr-Nd isotopic ratios of geological samples by using MC-ICP-MS.Conditions of 1600 ℃ for 1 min and 1400 ℃ for 1 min were adopted for fusing intrusive rocks and extrusive rocks,respectively.The rapid acid digestion technique is superior in digestion time compared with high-pressure PTFE bomb method.The procedural blanks of the method were also lower than that flux fusion.Replicate analyses of international certified reference materials (CRMs) indicate that isotopic ratios of 176Hf/177Hf,87Sr/86Sr and 143Nd/144Nd agree well with previously published data.The external reproducibility (2SD,n =5) of ten CRMs are ±0.000030 for 87Sr/86Sr,±0.000030 for 143Nd/144Nd,and ±0.000018 for 176Hf/177Hf. 【总页数】13页(244-256) 【关键词】

【作者】Zhian Bao;Chunlei Zong;Linru Fang;Honglin Yuan;Kaiyun Chen;Mengning Dai