DETERMINATION OF TH-228, TH-230, AND TH-232 IN ENVIRONMENTAL-SAMPLES FROM URANIUM MINING AND MILLING OPERATIONS

被引：9

作者：

DURHAM, RW ^{[1
]}

JOSHI, SR ^{[1
]}

机构：

[1] CANADA CTR INLAND WATERS, ENVIRONM CANADA, NATL WATER RES INST, POB 5050, BURLINGTON L7R 4A6, ONTARIO, CANADA

来源：

JOURNAL OF RADIOANALYTICAL CHEMISTRY | 1979年 / 52卷 / 01期

关键词：

D O I：

10.1007/BF02517712

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method is described for the determination of 238Th, 230Th and 232Th in environmental samples from U mining and milling operations. The analytical procedure is based on the direct determination of 228Th in the sample by high resolution .gamma.-spectrometry followed by extraction and purification of the Th fraction using high MW amines and an anion-exchange technique, respectively, prior to .alpha.-spectrometry to determine isotopic ratios. The lowest level of detection for each Th isotope is 0.01 pCi/g for solid samples and 20 pCi/l for aqueous samples. Replicate analyses of a typical mine waste stream gave a SD of .+-. 3% for 228Th. SD of the 230Th and 232Th increased to .+-. 11%, apparently due to traces of210Po interfering in the .alpha.-spectrometry.

引用

页码：181 / 188

页数：8

共 11 条

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