Issue 1093, 1967

The determination of plutonium in refractory materials by electrometric methods after dissolution by fusion with ammonium hydrogen sulphate

Abstract

A fusion with ammonium hydrogen sulphate at 400° C has been developed for the dissolution of refractory materials containing plutonium dioxide. On cooling, each melt is leached with sulphuric acid to produce a solution suitable for analysis for plutonium by electrometric methods. Plutonium concentrations (about 2 mg per ml) are determined either by a potentiometric titration based on the reduction of plutonium(VI) to plutonium(IV), or by a controlled-potential coulometric method, the Pu3+-Pu4+ couple being used. Both techniques are suitable for the accurate determination of plutonium with a precision of better than 0·20 per cent. (coefficient of variation) for about 5-mg amounts or less. The behaviour of many other elements in these methods has been studied in some detail.

The fusion technique has been found to be suitable for the dissolution of several refractory materials, including samples of PuO2-UO2 fired at 1550° C, and also samples of PuO2-ThO2 produced by the ignition at 900° C of the carbides of these elements coated with pyrolytic graphite. The determination of the plutonium contents of these samples was then completed directly by the electrometric methods.

Article information

Article type
Paper

Analyst, 1967,92, 239-246

The determination of plutonium in refractory materials by electrometric methods after dissolution by fusion with ammonium hydrogen sulphate

G. W. C. Milner, A. J. Wood, G. Weldrick and G. Phillips, Analyst, 1967, 92, 239 DOI: 10.1039/AN9679200239

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements