Complexation Equilibria of Cadmium Ions with Xylenol Orange as Studied by Cadmium Ion Selective Electrode

摘要

The complexation equilibria of cadmium ion(M) with Xylenol Orange(H6L) were studied by potentiometry with a cadmium ion selective electrode. The stability constants for MH3L, MH2L, MHL, ML, M2HL and M2L were obtained. These constants were consistent with the results of potentiometry with only a glass electrode and with those of spectrophotometry. The structure of each species is discussed.