Anodization of Glassy Carbon Electrodes in Oligomers of Ethylene Glycol and Their Monomethyl Ethers as a Tool for the Elimination of Protein Adsorption.

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  • Anodization of Glassy Carbon Electrodes

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The adsorption property of bovine serum albumin (BSA) on glassy carbon (GC) electrodes anodized in HO(CH2CH2O)nR (n=1-4, R=H or Me) has been evaluated by comparing cyclic voltammograms of caffeic acid before and after a treatment of the electrodes with a BSA solution. Electrodes modified with triethylene glycol and its monomethyl ether have proved to resist surface fouling due to BSA adsorption as well as to show satisfactory electrochemical performance. The reliability of the assessment was established by examining the amounts of BSA adsorbed on electrodes estimated by radioactivity measurements after a treatment with 125I-BSA. The analytical utility of a triethylene glycol-modified GC electrode has been demonstrated by analyzing a sample containing uric acid, acetaminophen, and BSA by reversed-phase high-performance liquid chromatography with an electrochemical detector, where a commercially available packed- column, allowing the passage of proteins, namely, requiring no pretreatment of samples for the removal of proteins, was utilized.

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  • Analytical Sciences

    Analytical Sciences 13 (5), 721-727, 1997

    社団法人 日本分析化学会

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