THE RAPID PREPARATION OF SEAWATER SIGMA-CO2 FOR RADIOCARBON ANALYSIS AT THE NATIONAL OCEAN SCIENCES AMS FACILITY

被引：118

作者：

MCNICHOL, AP ^{[1
]}

JONES, GA ^{[1
]}

HUTTON, DL ^{[1
]}

GAGNON, AR ^{[1
]}

KEY, RM ^{[1
]}

机构：

[1] PRINCETON UNIV,DEPT GEOL & GEOPHYS SCI,PRINCETON,NJ 08544

来源：

RADIOCARBON | 1994年 / 36卷 / 02期

关键词：

D O I：

10.1017/S0033822200040522

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：

We have established a laboratory for extracting Sigma CO2 from seawater samples for AMS analysis of the radiocarbon content. The seawater samples are collected at sea, poisoned and stored until analysis in the laboratory. Each sample is acidified; the inorganic carbon is stripped out as CO2 with an inert carrier gas and then converted to graphite. We present results for Buzzards Bay surface H2O and Na2CO3 standards that demonstrate we strip > 98% of inorganic carbon from seawater. Stable isotope analyses are performed to better than 0.2 parts per thousand, and the reproducibility of C-14 measurements on Buzzards Bay seawater is better than 13 parts per thousand. Finally, we compare data from samples collected in 1991 to those collected in the 1970s and to large volume samples.

引用

页码：237 / 246

页数：10