Conductometric determination of carbon in uranium carbide and its solution in nitric acid |
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Authors: | Ahmed M K Geetha R Pandey N K Murugesan S Koganti S B Saha B Sahoo P Sundararajan M K |
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Institution: | Reprocessing Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102 Tamil Nadu, India. |
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Abstract: | A simple but accurate method has been developed for the determination of carbon in uranium carbide powders/pellets as well as in solutions of uranyl nitrates. The methodology involves quantitative conversion of carbon present in the sample to carbon dioxide that is subsequently absorbed in a dilute solution of barium hydroxide. The conductivity shift of the barium hydroxide solution is monitored on-line continuously using a laboratory-built PC-based conductivity measurement system that has been developed in-house based on the direct conversion of conductance to the digital pulse frequency. A new gas absorption cell has been designed to ensure quantitative absorption during the residence time of the gas in the cell. The method is sensitive, accurate and precise to 1-3% at 600-1000 mug of carbon in samples of uranium carbide. |
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