精确测定同位素比的双标准方法  

DOUBLE STANDARD METHOD OF ACCURATE DETERMINATION OF ISOTOPE RATIO

作　　者：莫志超 Mo Zhichao

机构地区：[1]北京大学

出　　处：《岩矿测试》1983年第2期101-103,共3页Rock and Mineral Analysis

摘　　要：一、引言,质谱分析方法是同位素比测量的最精密的方法之一,也是最普遍的可靠测量手段。它能在极其微小的变化和涨落内测定同位素的含量和差异。在岩石和矿物等许多天然体中存在大量的碳、氢、氧、硫等元素及其他合物。随着一定的物理和化学作用等天然条件的改变,引起它们的同位素比的微小改变,即同位素分馏。应用质谱分析技术精确测定这些微小的改变,可以获得阐明这些变化因素的可靠实验数据,从而对了解岩石和矿物的来源、区分矿床的类型和成因等起着重要的作用。There are six equations have been derived from the double standard mathod of accurate determination of isotope ratio in this paper.Several methods of measuring isotope ratio can be designed according to the basis of these equations.The determinate result of each method is coincide with the standard deviation.Most of the results measurd by MAT-Ch5 mass spectrometer coincided with that measured by M M 602 D mass spectrometer.

关 键 词：同位素分馏 岩石和矿物 同位素比 质谱分析技术 精确测定 类型和成因 实验数据 测量手段 

分 类 号：P61[天文地球—矿床学]