A simple wet chemical method for the determination of cation stoichiometry of YBa2Cu3O7-d

A comprehensive wet chemical procedure for the rapid analysis of yttrium, barium and copper ions in dilute HNO3 medium has been developed to facilitate a precise and accurate determination of cation non-stoichiometry in high temperature ceramic superconducting materials Y1±xBa2±y Cu3±zO7-d. The ease of analysis for copper by electrogravimetry and of yttrium and barium by a complexometric titration of the same aliquot against complexone III using arsenazo I as the indicator under appropriate pH has been demonstrated with the help of individual standard solutions and with synthetic mixtures. (author)