Die quantitative bestimmung von alkali- und erdalkaliionen nebeneinander durch chloridimetrischefallungstitration in nichtwässrigen lösungen

The precipitation titration of mixtures of alkali and alkaline-earth metals in ketonic media was investigated ; the titrant was a solution of lithium chloride in ethanol or the ketone and the end-points were detected oscillometrically. Analyses of barium-sodium, barium-potassium and strontium-potassium mixtures were possible in methyl isobutyl ketone or acetone media. Acetone is the preferred medium because the precipitation equilibrium is reached very quickly, whereas a period of 15 min is needed in the case of methyl isobutyl ketone.