Radioiodine labelled amiodarone can be conveniently obtained in the presence of copper (Ⅱ) and excess reductant by hydrothermal method
at 100℃ for 1 hour and separated by TLC. Labelling efficiency is over 95%. Radiochemical purity is over 95%. The hydrothermal exchange method is a simple monocompartment isotope exchange reaction in homogeneous system and obeys the exponential law.
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Douglas P. Zipes and Paul J. Troup , Am. J. Cardiol. , 41 , 6 , 1005 ( 1978 ).
J. Mertens et al. , Fast quantitative labelling of p-I-123-N-isoprophylamphctamine (IMP) in presence of Cu (I) and ascorbic acid, allowing kit-form preparation , Taarbeeklaan, 103, B-1090, Brussels(Belgium) .