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Direct Spectrophotometric Determination of Gold in Alloys as Chloroaurate
Author(s) -
Avinur P.
Publication year - 1967
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.196700049
Subject(s) - chloroauric acid , chemistry , absorbance , alloy , gold alloys , gold alloy , gold compounds , analytical chemistry (journal) , platinum , nanotechnology , chromatography , colloidal gold , catalysis , materials science , biochemistry , nanoparticle , combinatorial chemistry , organic chemistry
A method is presented for a simple and direct determination of gold in alloys, utilizing a preliminary separation of gold from an alloy, and its subsequent conversion to chloroauric acid. The optical density of the chloroaurate ion is measured at two selected wavelengths, calculating the gold content of alloys by using the absorbance difference technique as developed by Glasner and Avinur. A suitable technique enables wide‐range determination in various samples of gold alloys ranging from 0.001% to over 90% gold content. Platinum does not interfere when present in small amounts in the alloy.