A FAST AND SENSITIVE ICP-MS ASSAY FOR THE DETERMINATION OF TH-230 IN MARINE-SEDIMENTS

被引：23

作者：

SHAW, TJ

FRANCOIS, R

机构：

[1] MIT,CAMBRIDGE,MA 02139

[2] WOODS HOLE OCEANOG INST,WOODS HOLE,MA 02543

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1991年 / 55卷 / 07期

关键词：

D O I：

10.1016/0016-7037(91)90045-7

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Inductively-coupled Plasma-Mass Spectrometry (ICP-MS) with quadrupole mass analysis provides a very fast and sensitive method for the determination of Th-230 in marine sediments. A detection limit of 0.40 DPM (36 femto-moles) was determined for the method with a precision of better than 3% (1-sigma). This is comparable to that of alpha-counting methods, but samples can be analyzed in five minutes, compared to up to two weeks counting time for alpha-spectrometry. Sample preparation is also significantly simplified, thus providing a relatively quick and easy method for the determination of "excess" Th-230 accumulation histories in deep-sea sediment cores.

引用

页码：2075 / 2078

页数：4

共 20 条

[11]

FRANCOIS R, 1991, IN PRESS SCIENCE

[12] THORIUM 230 PROFILING IN DEEP-SEA SEDIMENTS: HIGH-RESOLUTION RECORDS OF FLUX AND DISSOLUTION OF CARBONATE IN THE EQUATORIAL ATLANTIC DURING THE LAST 24,000 YEARS [J].