Authors:
H. Salar Amoli School of Pharmacy and Chemistry, University of Kingston, Surrey, KT1 2EE UK

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J. Barker School of Pharmacy and Chemistry, University of Kingston, Surrey, KT1 2EE UK

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A. Flowers School of Pharmacy and Chemistry, University of Kingston, Surrey, KT1 2EE UK

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Abstract  

This paper describes our development of an accurate determination of uranium by alpha spectrometry using various kinds of sample digestion methods. The sample preparation techniques employed an acid digestion with HNO3, and microwave oven digestion either by HNO3 or by combination of HNO3 and HF. The samples were obtained from surface and in depth(40 cm) soils from residential area. An extraction chromatography column has been used to separate the uranium from interference matrix and elements. Results show that the microwave method significantly speeds up the analysis time, reduces the volume of acids used and eliminates a large fraction of acid vapour emission. Compared with the uranium recoveries it was shown that microwave HNO3+HF achieved greater recovery (83%) than microwave HNO3 (78%), while less obtained by HNO3 digestion using hot plate (75%). Various kind of digestion methods have been applied (24 times) for two kind of soil sample. The reproducibility was acceptable and the average precision (coefficient of variation) was between 4 to 5. No significant differences between the precision of the methods have been observed. Acid volume required for the microwave procedures are a fraction of 5 times lower and the analysis time 6 times lower than traditional digestion by hot plate technique.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)