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

• 作者: Zhian Bao Chunlei Zong Linru Fang Honglin Yuan Kaiyun Chen Mengning Dai
• 来源期刊: 地球化学学报(英文）
• 关键词: Certified reference material Flux-free fusion Hf-Sr-Nd isotopic ratio Procedural blank Rapid acid digestion
• 年，卷（期）: 2022,（2）
• 页码范围: 244-256
• 页数: 12页
• 语种: 英文
• DOI: 10.1007/s11631-017-0207-x

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, 143Nd/144Nd, and 土0.000018 for ±0.000030 for 176Hf/177Hf.