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Abstract
The sample was dissolved in nitric and sulfuric acids followed by the additions of thallous sulfate and potassium iodide. The silver coprecipitated with thallous iodide was taken up in sulfuric acid and hydrogen peroxide. The solution was evaporated to dryness and the residue was treated with acetic acid (60 vol%) and p-dimethylaminobenzylidenerhodanine (0.0041%). The light absorbency at 580 m mu indicated the amount of silver. 0.4 approximates 4 ppm silver in uranium metal could be estimated, provided 5 g sample was taken and was made up into 5 ml of the colored solution. The coprecipitation rate with thallous iodide was confirmed to be more than 95%, by using Agllom as a tracer. (auth)
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