Determination of manganese in precipitated calcium carbonate samples using candoluminescence spectrophotometry: some problems associated with the preparation of standards

Abstract

The intense yellow candoluminescence given by manganese in a calcium oxide - calcium sulphate matrix when placed in a hydrogen - nitrogen - air flame has been used to investigate the determination of manganese (in the range 0.2–0.6 p.p.m.) in commercial samples of precipitated calcium carbonate. The results obtained by the candoluminescence emission technique have been compared with those obtained by atomic-absorption spectrophotometry and a kinetic spectrophotometric method.