摘要
钙(Ca)同位素可以提供生物过程、地质过程许多重要的信息,近年来高精度Ca同位素方法研究取得了许多重要进展。目前测定Ca同位素仪器主要是热电离质谱仪(TIMS)和多接收电感耦合等离子体质谱仪(MC-ICP-MS)。本文介绍了近年来Ca同位素分析中样品消解、分离富集方法及质谱测定等方面的研究成果。利用TIMS双稀释剂法可以获得高精度的Ca同位素数据,是目前测定Ca同位素的主要方法。双稀释剂组合配比、样带选择、积分时间、杯结构设置和点样操作均会影响Ca同位素的测试精度,蒙特-卡洛模拟计算是优化Ca同位素测试条件的有效手段。
The Ca isotopic compositions can provide numerous important information on biological and geological processes. Many important progresses on the high resolution Ca isotope analytical methods have been made recently by using thermal ionization mass spectrometry（ TIMS） or multi-collector inductively coupled plasma mass spectrometry（ MC-ICPMS）. This paper has introduced some achievements on methods for sample digestion,separation and concentration,and mass spectrometry measurement for Ca isotopes. High precision Ca isotope data can be obtained by using a TIMS doublespike method which is a current primary method for practically analyzing calcium isotope. The proposed Monte Carlo simulation is an effective method to optimize conditions of double spike mixture ratios,filament combination,integration time,cup configuration,and sample loading in order to improve the measurement precision of the double spike technique.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2016年第3期487-496,401,共10页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金项目(41273005,41073007)
