Automatic Potentiotitrimetric Determination of Amount of Ca and Total Amount of Ca-Mg in Desulfurizing Pasty Liquor

The content of Ca and total content of Ca-Mg in desulfurizing pasty liquor were determined by automatic potentiometric titration using EDTA standard solution as titrant in an ammoniacal buffer solution of pH 10. The proposed method was applied to the determination of Ca and Mg in samples of desulfurizing pasty liquor, giving values of recovery and RSD′s (n=5) in the ranges of 98.2%-100.4% and 0.48%-0.64% for Mg; and 97.6%-100.7% and 0.54%-0.99% for Ca respectively.