title: Determination of gold in copper-bearing sulphide ores and metallurgical flotation products by atomic-absorption spectrometry.
abstract: A method is described which is specific for the determination of gold in sulphide copper ores and concentrates. Direct decomposition with aqua regia was found to be incomplete. A carefully controlled roasting stage followed by treatment with hydrochloric acid and then aqua regia was effective for dissolving all the gold. The gold is extracted into 4-methylpentan-2-one (methyli-sobutylketone) then aspirated into a very lean air-acetylene flame and the gold determined by atomic-absorption spectrometry. No interferences were observed from large concentrations of copper, iron or nickel.
authors.affiliation: Charter Consolidated Metallurgical Laboratory, Ashford, Kent, England.
authors.forename: B
authors.initials: B
authors.lastname: Strong
authors.forename: R
authors.initials: R
authors.lastname: Murray-Smith