γ-RAY INDUCED OXIDATION OF STANNOUS CHLORIDE IN AQUEOUS HYDROCHLORIC ACID SOLUTIONS

1960 ◽  
Vol 64 (9) ◽  
pp. 1277-1279 ◽  
Author(s):  
Alexander R. Amell
Keyword(s):  
Hydrochloric Acid ◽  
Stannous Chloride ◽  
Acid Solutions ◽  
Aqueous Hydrochloric Acid ◽  
Hydrochloric Acid Solutions ◽  
Γ Ray

THE SEPARATION OF SMALL AMOUNTS OF THE PLATINUM METALS: 1. THE COLORIMETRIC DETERMINATION OF RHODIUM AND ITS SEPARATION FROM IRIDIUM

1961 ◽  
Vol 39 (12) ◽  
pp. 2389-2393 ◽  
Author(s):  
D. E. Ryan
Keyword(s):  
Hydrochloric Acid ◽  
Stannous Chloride ◽  
Colorimetric Determination ◽  
Acid Solutions ◽  
Platinum Metals ◽  
Hydrochloric Acid Solutions ◽  
Product Separation ◽  
Chromous Chloride ◽  
Made In

A method for separating small amounts of rhodium from iridium is described. In 3 to 9 M hydrochloric acid solutions, the amber-to-red complex of bivalent rhodium with 4,5-dimethyl-2-mercaptothiazole is formed after reduction of tervalent rhodium with chromous or stannous chloride. Rhodium is quantitatively separated from iridium by chloroform extraction of this product; separation can be made in solutions that have been fumed with sulphuric acid if chromous chloride is used for the prior reduction of the rhodium. The complex, after removal of the chloroform, is dissolved in dilute hydrochloric acid, and the optical density of the resulting colored solution is measured.

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