OPTIMIZATION OF A RADIOANALYTICAL PROCEDURE FOR THE DETERMINATION OF URANIUM ISOTOPES IN ENVIRONMENTAL-SAMPLES

被引：29

作者：

PIMPL, M

YOO, B

YORDANOVA, I

机构：

[1] KOREA ADV ENERGY RES INST,TAEJON,SOUTH KOREA

[2] BULGARIAN ACAD SCI,INST SOIL SCI & AGROECOL,BU-1113 SOFIA,BULGARIA

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1992年 / 161卷 / 02期

关键词：

D O I：

10.1007/BF02040490

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A radiochemical procedure is described for the fast and sensitive measurement of uranium isotopes in gaseous and liquid effluents of nuclear facilities. Equally, this procedure is suitable to measure uranium isotopes in all kinds of environmental samples. Uranium is leached from ashed sample materials with HNO3, HF, and Al(NO3)3 solution and separated from matrix elements by extraction with trioctylphosphinic oxide and back extraction with NH4F. After radiochemical cleaning by coprecipitation with LaF3 and anion exchange, uranium isotopes are electroplated on stainless steel discs from HCl/oxalate solution. The preparation is measured by alpha-spectrometry using surface barrier detectors. The detection limit for 1000 minutes of counting time is 2 mBq per sample and nuclide, the chemical yield is in the range of 50 to 80%.

引用

页码：437 / 441

页数：5

共 10 条

[1] REVIEW OF CHEMICAL-SEPARATION TECHNIQUES APPLICABLE TO ALPHA-SPECTROMETRIC MEASUREMENTS [J].