alexa The effect of cetyltrimethyl ammonium bromide on the electrochemical determination of thyroxine.
Engineering

Engineering

Journal of Biosensors & Bioelectronics

Author(s): He Q, Dang X, Hu C, Hu S

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Abstract Electrochemical behavior of thyroxine at a polyvinylpyrrolidone modified carbon paste electrode in the presence of cetyltrimethyl ammonium bromide was described. Thyroxine underwent totally irreversible oxidation at this system and a well-defined peak at 0.42 V was obtained. The influence of various surfactants on the oxidation of thyroxine was examined by cyclic voltammetry. Chronocoulometry was also used to investigate the electrode process. In the range 2 x 10(-7) to 9 x 10(-6)mol/l, the thyroxine concentration was linear with the oxidation peak current and a low detection limit of 8 x 10(-8) mol/l was obtained for 5 min accumulation. This article was published in Colloids Surf B Biointerfaces and referenced in Journal of Biosensors & Bioelectronics

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