242Pu as tracer for simultaneous determination of 237Np and 239,240Pu in environmental samples

被引：48

作者：

Chen, QJ ^{[1
]}

Dahlgaard, H ^{[1
]}

Nielsen, SP ^{[1
]}

Aarkrog, A ^{[1
]}

机构：

[1] Riso Natl Lab, Dept Nucl Safety Res, DK-4000 Roskilde, Denmark

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2002年 / 253卷 / 03期

关键词：

Plutonium compounds;

D O I：

10.1023/A:1020429805654

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A procedure has been developed using Pu-242 as tracer for simultaneous determination of Np-237 and Pu-239,Pu-240 in environmental samples. The validity of the method has been demonstrated by ICPMS and alpha-spectroscopy for up to 10 gram soil and sediment, seawater up to 200 litres. The paper describes a suitable chemical procedure for Np and Pu including a quantitative pre-concentration of neptunium and plutonium, preparation of Np4+ and Pu4+, NP(NO3)(6)(2-) and Pu(NO3)(6)(2-), The ratio of Np-237/Pu-242 (or Np-237/Pu-239) before and after the procedure has been determined using 10 g soil (free from Np and Pu) R-before/R-after = 1.004 +/- 3.3% (S.D n = 20) and 1 litre seawater R-before/R-after = 1.019+/-1.9% (S.D., n = 12). Results from the intercomparison samples LAEA-135, LAEA-381 and from environmental samples are presented.

引用

页码：451 / 458

页数：8

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