A new method of caesium determination by thermal decomposition of caesium tetrathiocyanatobismuthate(III).
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.
Cygański
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Institute of General Chemistry, Technical University of Łódź, 90-924 Łódź, Poland.
Majewski
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