CHEMISTRY OF THE RARE-EARTHS. PART II. MACRO- AND MICRO-ESTIMATION OF CAESIUM IN PRESENCE OF POTASSIUM AND RUBIDIUM WITH THE HELP OF RARE-EARTHS

An improved method for the quantitative determination of caesium and its separation from rubidium and potassium has been described. Cs has been precipitated as Cs₂NaL(NO₂)₆ and weighed directly in a gooch crucible. Cs has also been determined volumetrically by estimating the nitrite content of the compound with cede sulphate. Both gravimetric and volumetric processes have been successfully adopted for micro-determination of caesium.