Analysis of phosphate rock samples for vanadium using accelerator-based thermal neutrons |
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Authors: | F Z Khiari A Aksoy A Sahin |
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Institution: | (1) Center for Applied Physical Sciences, Research Institute, King Fahd University of Petroleum and Minerals Dhahran, 31261, Saudi Arabia;(2) Center for Petroleum and Minerals, Research Institute, King Fahd University of Petroleum and Minerals Dhahran, 31261, Saudi Arabia |
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Abstract: | Extensive sedimentary phosphate deposits exist in the Sirhan-Turayf basin in northwestern Saudi Arabia containing significant
amounts of uranium, thorium, vanadium and rare earth elements. The determination of the concentration and pattern of distribution
of some of these elements is essential for economic aspects. This study reports the analysis of vanadium in selected phosphate
rock samples from the basin using accelerator-based thermal neutrons activation analysis (TNAA). Samples were irradiated in
a thermal neutron flux of 2.5·106 n·cm−2·s−1. The induced activity was measured with a HP-GMX detector coupled to a PC-based data acquisition and analysis system. The
facility was calibrated using certified standards of vanadium. The minimum detection limit of vanadium was about 1 mg. Three
independent measurements on each sample yielded comparable results indicating the reliability of the technique. The vanadium
concentrations in the samples vary from 23 to 457 ppm.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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