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Spectrophotometric Determination of Iron and Cobalt in Super Alloys
Author(s) -
Tsai SuhJen J.,
Jong YihLing
Publication year - 1989
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198900002
Subject(s) - chemistry , cobalt , phenanthroline , absorbance , reagent , alloy , metal ions in aqueous solution , metal , inconel , chromophore , inorganic chemistry , analytical chemistry (journal) , metallurgy , chromatography , photochemistry , materials science , organic chemistry
The quantitative analysis of iron and cobalt in super alloys has been studied. 1,‐10‐Phenanthroline and nitroso‐R salt provide the chromophores for iron(II) and cobalt(II), respectively. The possibility of applying these photometric methods to a relatively complex substance, such as a super alloy, has been evaluated on the bases of precision and accuracy. The absorbance characteristics of metal complexes and the possible interference from foreign ions have also been carefully investigated. The presence of a high concentration of Ni results in a reducation of the amount of 1,10‐phenanthroline available for the formation of ferroin complexes while Mo does not have this effect. The analytical methods have been applied to the super alloys, Inconel 718, Hastelloy X, and Inconel X‐750. The modified 1,10‐phenanthroline photometric method and the standard nitroso‐R salt photometric method give high accuracy and good precision. This illustrates the analytical applicability of these reagents to super alloys.