PRECISE DETERMINATION OF FEMTOGRAM QUANTITIES OF RADIUM BY THERMAL IONIZATION MASS-SPECTROMETRY

被引：68

作者：

COHEN, AS

ONIONS, RK

机构：

[1] Department of Earth Sciences, University of Cambridge

来源：

ANALYTICAL CHEMISTRY | 1991年 / 63卷 / 23期

关键词：

D O I：

10.1021/ac00023a008

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Femtogram quantities of Ra-226 (approximately 3 x 10(6) atoms, or 4 x 10(-5) Bq) have been determined in environmental materials, including seawater, mineral samples, and silicate rocks, by thermal ionization mass spectrometry. Chemical separation techniques suitable for all these materials are described here. Overall, these techniques enable the abundance of Ra-226 to be determined in samples of both seawater and silicates which are some 10(3) times smaller than those required by conventional radioactive counting methods.

引用

页码：2705 / 2708

页数：4

共 12 条

[1] PRECISION K-RB-SR ISOTOPIC ANALYSIS - APPLICATION TO RB-SR CHRONOLOGY [J].