Spectrophotometric Determination of Thyroxine Sodium with p-Benzoquinone
作者： S. Z. El-khateeb
DOI: 10.1080/00032718908051251
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摘要: Abstract A simple, sensitive and selective spectrophotometric method has been developed for the determination of thyroxine sodium. It is based on a reaction with excess p-benzoquinone in ethanol (95%) whereby 1:1 (thyroxine sodium: quinone) coloured product obtained, which an apparent molar absorptivity 2.911 × 103 1mol−1 Beer's law obeyed over range 40–200 μg.ml−1. When applied to tablets labelled contain 100 μg, proposed gave mean recoveries 99,13 ± 0.36% different amounts added authentic drug.
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