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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 11, Number 1
JKCSEZ 11(1)
February 20, 1967 

Determination of Gold in Ores

금광석중의 금분석
Jae Hyun Yang, Kee Won Cha

양재현, 차기원
A method of determination of gold in ores has been established: Dissolved ore solution is evaporated to dryness, redissolved with 0.1N HCl then chloroaurate formed is adsorbed on anion exchange resin, Dowex 1·× 4. The resin is ignited and the residue is dissolved with HCl-HNO3. After evaporation of the acid, and then dilution with water, sodium azide is added. The gold is extracted with amyl alcohol from the solution buffered to pH 6. The gold is determined by measuring absorbancy of the alcohol layer spectrophotometricaly at 385mμ. Various factors, HCl concentration, amount of the resin rate, if adsorption, foreign ions, effecting to the method, have been examined. This method seems to be satisfactory for the determination of gold presented dawn to 1g per metric ton in ore.
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