Improved determination of tributyl phosphate degradation products (mono- and dibutyl phosphates) by ion chromatography

被引:36
作者
Dodi, A [1 ]
Verda, G [1 ]
机构
[1] CEN Cadarache, Dept Etud Dechets, Direct Energie Nucl, F-13108 St Paul Durance, France
关键词
nuclear industry; butyl phosphates; phosphates; organophosphorus compounds;
D O I
10.1016/S0021-9673(01)00834-2
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Tributyl phosphate (TBP) is a very important compound in the nuclear industry, particularly in the area of nuclear fuel reprocessing. This compound is used in the PUREX (plutonium and uranium refining extraction) process which consists of the extraction of uranium and plutonium from an aqueous nitric acid phase, for the purpose of recycling. But TBP may be degraded to dibutyl phosphate (DBP) and monobutyl phosphate (MBP) by dealkylation of one or two butoxy groups, respectively. We have compared and evaluated the capacity of two resins manufactured by Dionex (AS11 and ASSA) in the separation and measurement of these two degradation products. AS11 generates two interferences: nitrite/DBP and carbonate/MBP. The first one is the most serious. So, we have developed a method for oxidising nitrite ions to nitrate ions which have no trouble over the measurement. The second resin tested, AS5A, allows a very efficient separation between DBP and NO; ions and a good separation between MBP and CO32- in comparison with the AS11. The detection limits for the AS5A column are 0.13 muM for MBP and 0.71 muM for DBP (injection loop = 50 mul). (C) 2001 Elsevier Science B.V. AH rights reserved.
引用
收藏
页码:275 / 281
页数:7
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