Abstract − Analytical Sciences, 18(4), 413 (2002).
Electrochemical Behavior of Thiamineon a Self-Assembled Gold Electrode and Its Square-Wave VoltammetricDetermination in Pharmaceutical Preparations
Qijin WAN, Nianjun YANG,and Yongkang YE
Department of Chemistry, Hubei NormalUniversity, Huangshi 435002, P. R. China
The electrochemical behavior of thiamine ona self-assembled electrode of L-cysteine (Cys/SAM/Au) has been investigatedand Cys/SAM/Au can be used to detect thiamine using square-wave voltammetry(SWV). At pH 11.40 Britton-Robinson buffer, thiamine exhibits awell-defined anodic peak on Cys/SAM/Au. Under the optimized conditions,the anodic peak current of SWV was linear with the content of thiamine inthe range of 1.1 x 10-8 - 2.2 x 10-6 mol/L; thedetection limit was 5.5 x 10-9 mol/L. The method wassuccessfully applied to the determination of thiamine in pharmaceuticalpreparations.
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