Precipitation from homogeneous solution by photochemical action: determination of thorium.
Thorium was precipitated from homogeneous solution by photochemical reduction of periodate to iodate in a solution containing thorium and perchloric acid, by means of a 2537 A low-pressure mercury vapour lamp. For weighing, the precipitate was redissolved, precipitated once as thorium hydroxide, and finally as thorium oxalate, which was ignited to thorium dioxide. Quantitative results were obtained in the range 35-180 mg of thorium.
Das
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Department of Chemistry, Boston University, Boston, Massachusetts 02215, U.S.A.
Heyn
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Hoffman
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