Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Simultaneous Determination of Mo, As, Th and K Impurities in Extracted Uranium Matrix, by ICP-OES

Document Type : Research Paper

Authors

Javad Yazdani
Hossein Rostamizadeh
Mohammadreza Rezvanianzadeh
SeyedAbbas Rahimi
Hossein Shahmir Barzaki
Rasoul Sayari
Masoud AghaHosseini
Ali Souri
Abstract
Replacement of four individual, time-consuming and expensive ASTM standard methods for determination of Mo, As, Th and K in samples having uranium matrix with one new proficient method is considered. The main advantages of this method are overcoming the mentioned shortages and preserving the precision and accuracy of the analysis results for the desired technical specification of materials and nuclear industries. In the new method, the interfering uranium matrix was removed by extraction with a mixture of tri (2- ethylhexyl) phosphate (TEHP): n-Heptane. The elements were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES) simultaneously. The effective parameters on the extraction including: pH, the remained uranium and temperature were studied. The dynamic range of calibration curve related to the element type was linear (R2>0.999) at 10-500 μg/g U. The method detection limits (MDL) of 0.51, 0.66, 1.1 and 0.55 μg/g U were obtained for Mo, As, Th and K, respectively. The obtained quantity of En for all elements was less than 0.26. The analytical precision and bias of current method at two different concentration levels were determined and compared with the available standard methods denoting an evidence of the method verification. The decreased analysis of time duration from ~24 hr to  
 

Keywords

Simultaneous Determination
Uranium Matrix
Impurity
Extraction
ICP-OES
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