A new method of caesium determination by thermal decomposition of caesium tetrathiocyanatobismuthate(III)

A Cygański; T Majewski

doi:10.1016/0039-9140(83)80160-x

A new method of caesium determination by thermal decomposition of caesium tetrathiocyanatobismuthate(III)

Talanta. 1983 Sep;30(9):699-701. doi: 10.1016/0039-9140(83)80160-x.

Authors

A Cygański¹, T Majewski

Affiliation

¹ Institute of General Chemistry, Technical University of Łódź, 90-924 Łódź, Poland.

PMID: 18963447
DOI: 10.1016/0039-9140(83)80160-x

Abstract

A thermal method of caesium determination is reported. The method is based on precipitation of Cs[Bi(SCN)(4)], thermal decomposition of this compound at 500 degrees , absorption of the evolved SO(2) in Na(2)HgCl(4) solution, and finally titration of the acid formed. The method can be used to determine caesium in the presence of potassium, ammonium and rubidium. When rubidium is present, caesium and rubidium can be determined simultaneously on the basis of the weight of the precipitate and the amount of sulphur dioxide evolved.