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Determination of Radioactive Cobalt
Author(s) -
Hahn Richard B.,
Marsh Richard H.
Publication year - 1965
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1965.tb01392.x
Subject(s) - cobalt , nitric acid , cobalt extraction techniques , chemistry , cobalt hydroxide , absorbance , nitrate , precipitation , inorganic chemistry , cobalt 60 , gravimetric analysis , nuclear chemistry , potassium thiocyanate , radiochemistry , liquid scintillation counting , chromatography , irradiation , organic chemistry , physics , electrode , meteorology , nuclear physics , electrochemistry
This article discusses a method for the determination of Cobalt‐60 (Co 60 ) that uses a spectrophotometric measurement to determine the recovery of cobalt carrier, rather than the gravimetric method used in other procedures. Radiocobalt is concentrated from the water sample by precipitation as cobalt hydroxide. The precipitate is dissolved in nitric acid and then converted to the complex thiocyanate, which is extracted into methylisobutyl ketone. The cobalt is back extracted into water and precipitated as potassium cobaltinitrite, which is dissolved in nitric acid to form soluble cobalt nitrate. This solution is gamma counted with a well‐type scintillation counter. Recovery of cobalt carrier is determined by measuring the absorbance of the cobalt nitrate solution at 510 mμ.