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

Abstract

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.