Abstract
THE communication by T. R. Scott1 raises the point of the effect of bicarbonate in the hydrogen peroxide method for the absorptiometric determination of uranium. It should be pointed out that although this particular example had not been noted previously, it is one instance of two general effects which have not been stressed in the literature referring to this method. These are that the light absorption or optical density for a given concentration of uranium with excess peroxide present is dependent (a) upon the final pH. and (b) upon the particular alkali used (or if a mixture, upon the relative amounts); for example, we have shown that sodium hydroxide and sodium carbonate may give different results even at a given final pH. The accompanying graph illustrates these points.
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References
Scott, T. R., Nature, 163, 768 (1949).
Sandell, E. B., "Colorimetric Determination of Traces of Metals" (Interscience Publishers Inc., New York, 1944).
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SMALES, A., FURBY, E. Absorptiometric Determination of Uranium. Nature 164, 579 (1949). https://doi.org/10.1038/164579a0
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DOI: https://doi.org/10.1038/164579a0
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