Catalytic-kinetic potentiometric determination of thyroxine |
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| Authors: | M Timotheou-Potamia EG Sarantonis AC Calokerinos TP Hadjiioannou |
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| Institution: | Laboratory of Analytical Chemistry, University of Athens, Athens Greece |
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| Abstract: | A kinetic method is described for the determination of thyroxine (0.4–4 μg ml?1), based on its catalytic effect on the reduction of cerium(IV) by arsenic(III). The reaction is monitored potentiometrically; the time required for a 20-mV change in potential is inversely proportional to the thyroxine concentration. The method is applicable to tablets. |
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