Summary
Small amounts of gold can be extracted into dichloroethane as nitron tetrachloroaurate(III) and then determined by any suitable method such as spectrophotometry of methylene blue tetrachloroaurate(III). The method is suitable for estimating gold in lead concentrates. Platinum and palladium interfere.
Zusammenfassung
Kleine Mengen Gold können als Nitronchloroaurat(III) mit Dichloräthan extrahiert und dann mit einer der bekannten Methoden z. B. spektrophotometrisch als Methylenblautetrachloroaurat(III) bestimmt werden. Das Verfahren eignet sich zur Goldbestimmung in Bleikonzentraten, aber Platin und Palladium stören.
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Gantchev, N., Dimitrova, A. The use of nitron separating gold in case of its estimation in lead concentrates. Mikrochim Acta 59, 476–478 (1971). https://doi.org/10.1007/BF01219055
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DOI: https://doi.org/10.1007/BF01219055