Chem. J. Chinese Universities ›› 1984, Vol. 5 ›› Issue (1): 45.
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Gong Hongzhong, Xiao Dan, Wang Caili
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Abstract: A new construction of the aurocyanide ion-selective electrode has been made. A PVCsensing membrane has been consisted of the aurocyanide salt of the trioctylhexade-cylammonium as the ion-exchanger. The platinum electrode immersed in a 0.01M KAu(CN)2-0.01M K3Fe(CN)6-0.01M K4Fe(CN)6 solution has been tested as the internal reference electrode system. The basic characteristics of the electode are studied. At 25℃, the electrode shows Nernstian response for aurocyanide ion over the concentration range from 1× 10-1M to 3.2×10-7 Maurocyanide ion with a slope of 59mV. The detection limit is down to 8×10-8M. The potential selectivity coefficients for more than ten anions have been measured, and the regularity of the potential selectivity coefficients has been discussed. The results show that the electrode exhibits a good selectivity for the aurocyanide ion. In a preliminary application gold in aurocyanide plating solution has been determined by using the proposed electrode.
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Gong Hongzhong, Xiao Dan, Wang Caili . STUDIES ON A NEW CONSTRUCTION OF THE AUROCYANIDE ION-SELECTIVE ELECTRODE[J]. Chem. J. Chinese Universities, 1984, 5(1): 45.
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