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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.

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A method is presented for the gravimetric determination of gold in alloys. Based on a known procedure used in metallurgy, it involves the separation of gold from the other elements constituting the alloy, by the aid of the “parting process”, suitably modified. It involves a relatively simple technique with a high degree of accuracy. Gold was successfully determined in the presence of the following metals: Ag, Cd, Cu, Cr, Fe, Mn, Ni, Pd, Sn, Zn. Platinum seriously interferes with the analysis.

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