He Juan, Meija Juris, Yang Lu
Analytical & Testing Center, Sichuan University, Chengdu 610064, China.
National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada.
Anal Chem. 2021 Mar 30;93(12):5107-5113. doi: 10.1021/acs.analchem.0c04744. Epub 2021 Mar 18.
Measurements of zirconium isotopes provide insights into the formation of planetary bodies, dating nuclear explosions, or maintenance of nuclear reactors. Although many comparative measurements for the isotopic composition of zirconium have been performed using mass spectrometry, there is a lack of zirconium isotopic reference materials and only a single calibrated measurement has been reported to date by total evaporation thermal ionization mass spectrometry (TE-TIMS). In this study, we report an independent measurement of full zirconium isotopic composition in a new zirconium isotopic reference material by multicollector inductively coupled plasma MS using the regression method and two independent certified isotopic reference materials, NIST SRM 984 Rb and NIST SRM 987 Sr. Our results agree well with the recent TE-TIMS measurements and suggest a revision of the standard atomic weight of zirconium.
锆同位素的测量为行星体的形成、核爆炸年代测定或核反应堆的维护提供了见解。尽管已经使用质谱法对锆的同位素组成进行了许多比较测量，但缺乏锆同位素参考材料，并且迄今为止通过全蒸发热电离质谱法（TE-TIMS）仅报道了一次校准测量。在本研究中，我们通过多接收电感耦合等离子体质谱法，使用回归方法以及两种独立的经认证的同位素参考材料NIST SRM 984 Rb和NIST SRM 987 Sr，报告了一种新的锆同位素参考材料中锆全同位素组成的独立测量结果。我们的结果与最近的TE-TIMS测量结果非常吻合，并建议对锆的标准原子量进行修订。
