DETERMINATION OF THORIUM ISOTOPES IN SEAWATER BY NONDESTRUCTIVE AND RADIOCHEMICAL PROCEDURES

被引：116

作者：

BUESSELER, KO ^{[1
]}

COCHRAN, JK ^{[1
]}

BACON, MP ^{[1
]}

LIVINGSTON, HD ^{[1
]}

CASSO, SA ^{[1
]}

HIRSCHBERG, D ^{[1
]}

HARTMAN, MC ^{[1
]}

FLEER, AP ^{[1
]}

机构：

[1] SUNY STONY BROOK,MARINE SCI RES CTR,STONY BROOK,NY 11794

来源：

DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS | 1992年 / 39卷 / 7-8A期

关键词：

D O I：

10.1016/0198-0149(92)90059-3

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Procedures have been developed for the analyses of dissolved and particulate Th-234, Th-228, Th-230 and Th-232 in seawater. Large volume samples (>1000 1) are collected using in situ pumps. Seawater is pumped sequentially through a filter cartridge and two MnO2 adsorbers for the collection of particulate and dissolved Th, respectively. Both filters-and adsorbers are analysed for Th-234 using a simple gamma counting technique. This newly developed Th-234 procedure can be conducted at sea, and thus provides an easy and efficient method for Th-234 analyses on large volume samples. Subsequent radiochemical purification procedures and low-level alpha counting techniques are used in the laboratory for the analyses of Th-228, Th-230 and Th-232 on these same samples.

引用

页码：1103 / 1114

页数：12

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