Abstract
THE “iodate method,” first proposed by L. W. Andrews in 1903, depends on the formation of iodine monochloride, and the disappearance of the iodine colour imparted to an immiscible solvent such as chloroform or carbon tetrachloride. Since the last traces of free iodine are collected in a small volume of immiscible solvent, the sharpness of the end-point is remarkable; and when a titration has been completed, there is no return of the iodine-colour even after keeping the solutions for a day. These factors, together with the great stability of the solutions of potassium iodate and the absence of interference by many kinds of organic matter, make the use of this method very advantageous in many forms of analysis. The author has therefore put together a description of a dozen different determinations (e.g. of Sb, Cu, Hg, Mo, Sn, Mn, N2H4, H2O2, PbO2, etc.) in which the method can be employed with advantage. He has further increased the value of the book by giving details of the application of the method to the analysis of arsenic and copper in insecticides, of antimony, copper and tin in alloys, etc. The book should be of considerable value in giving publicity to a new and valuable method of analysis, as well as in providing precise directions for applying it.
Volumetric Iodate Methods.
Dr.
George S.
Jamieson
By. (New York: The Chemical Catalog Co., Inc., 1926.) 2 dollars.
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Volumetric Iodate Methods . Nature 117, 751 (1926). https://doi.org/10.1038/117751c0
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DOI: https://doi.org/10.1038/117751c0