New Convenient Dissolution of Iron-Rhodium Alloys Using Hydrochloric Acid Containing a Small Amount of Nitric Acid without Heating for an ICP-AES Analysis

A new convenient dissolution method for Fe-Rh alloys has been developed. Aqua regia has been used for the dissolution of rhodium alloy samples. However, it is difficult to dissolve high-concentration rhodium (more than 50 mass%) in aqua regia, because a rhodium-passivity on the alloys surface occurs...

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Veröffentlicht in:	Analytical Sciences 2001, Vol.17(8), pp.1011-1013
Hauptverfasser:	DANZAKI, Yuetsu, ASHINO, Tetsuya
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Analysing. Testing. Standards Analytical chemistry Applied sciences Chemistry Exact sciences and technology Hydrochloric acid Metals. Metallurgy Nitric acid Rhodium Spectrometric and optical methods Standardization and quality control
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Beschreibung
Zusammenfassung:	A new convenient dissolution method for Fe-Rh alloys has been developed. Aqua regia has been used for the dissolution of rhodium alloy samples. However, it is difficult to dissolve high-concentration rhodium (more than 50 mass%) in aqua regia, because a rhodium-passivity on the alloys surface occurs with nitric acid. By using hydrochloric acid containing a small volume of nitric acid, Fe-Rh (24 - 64 mass%) alloys could be completely decomposed and dissolved under mild experimental conditions. The principal advantages of this method are simplicity and time-saving compared with other dissolution methods.
ISSN:	0910-6340 1348-2246
DOI:	10.2116/analsci.17.1011