Abstract
Mesoporous SiO2 of SBA-15 is reported to modify carbon paste electrodes for detecting epinephrine (EP). Carbon paste electrodes modified with synthesized SBA-15 show high sensitivity for voltammetric determination of EP, which is attributed to the strong adsorption ability of SBA-15 to EP and large surface area of the working electrode resulted from SBA-15 modification. The effects of pH value, amount of SBA-15 and scan rate were investigated. Under optimum conditions, the anodic peak current of EP was proportional to its concentration over the range from 1.0 × 10−6 to 6.0 × 10−5 mol L−1 and the limit of detection was 6.0 × 10−7 mol L−1. The results show mesoporous SiO2-modified carbon paste electrodes, particularly SBA-15-modificd electrodes, create new opportunities for sensitive, simple and suitable method in the electrochemical analysis of EP.
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Published in Russian in Elektrokhimiya, 2013, Vol. 49, No. 11, pp. 1196–1202.
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Yi, H., Li, Z. & Li, K. Application of mesoporous SiO2-Modified carbon paste electrode for voltammetric determination of epinephrine. Russ J Electrochem 49, 1073–1080 (2013). https://doi.org/10.1134/S1023193512080046
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DOI: https://doi.org/10.1134/S1023193512080046