PRECONCENTRATION OF TRACE-ELEMENTS FROM HIGH-PURITY THORIUM AND URANIUM ON CHELEX-100 AND DETERMINATION BY GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY WITH ZEEMAN-EFFECT BACKGROUND CORRECTION

被引：20

作者：

RAJE, N ^{[1
]}

KAYASTH, S ^{[1
]}

ASARI, TPS ^{[1
]}

GANGADHARAN, S ^{[1
]}

机构：

[1] BHABHA ATOM RES CTR,DIV ANALYT CHEM,BOMBAY 400085,INDIA

来源：

ANALYTICA CHIMICA ACTA | 1994年 / 290卷 / 03期

关键词：

ATOMIC ABSORPTION SPECTROMETRY; SAMPLE PREPARATION; PRECONCENTRATION; THORIUM; TRACE ELEMENTS; URANIUM;

D O I：

10.1016/0003-2670(94)80125-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Preconcentration of trace impurities from large-sized samples of uranium metal and thorium oxide using a small column of Chelex-100 followed by their determination using graphite furnace atomic absorption spectrometry (GFAAS) is reported. A 0.5-10-g amount of the sample (uranium metal or thorium oxide) was dissolved, complexed with ammonium carbonate and subjected to the ion-exchange procedure. The retained analytes were eluted with 2-4 M nitric acid and brought to a small volume for a final dilution to 10-25 mi for their determination using GFAAS. The validity of the separation procedure and recoveries at mu g kg(-1) levels was checked by standard addition; the recoveries were > 95%.

引用

页码：371 / 377

页数：7

共 33 条

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