Abstract:An automatic potentiometric titration method for the determination of silver in gold silver composite particles obtained from the samples of purchased copper materials after smelting, enrichment and soot blowing by fire assaySwas investigated in this work. After the gold and silver complex particles wereSdissolved in nitric acid, the silver content is titrated with potassium thiocyanate standard solution on the automatic potentiometric titrator. The determination conditions of the instrument are selected, and the interference of solution acidity and coexisting elements on the determination wasSinvestigated. The relative standard deviation of the method is 1.34% - 3.62%, which is consistent with the results of potassium thiocyanate manual titration and impurity reduction. The accuracy and precision of the method can meet the needs of analysis, and it has strong practicability and popularization value.