Voltammetric determination of bisphenol A in food package by a glassy carbon electrode modified with carboxylated multi-walled carbon nanotubes

Junhua Li; Daizhi Kuang; Yonglan Feng; Fuxing Zhang; Mengqin Liu

Microchimica Acta 172(3-4): 379-386

2011


DOI: 10.1007/s00604-010-0512-0
Accession: 064153335

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Abstract
A highly sensitive and mercury-free method for determination of bisphenol A (BPA) was established using a glassy carbon electrode that was modified with carboxylated multi-walled carbon nanotubes. A sensitive oxidation peak is found at 550 m V in linear sweep voltammograms at p H 7. Based on this finding, trace levels of bisphenol A can be determined over a concentration range that is linear from 10 n M to 104 n M, the correlation coefficient being 0.9983, and the detection limit (S/N = 3) being 5.0 n M. The method was successfully applied to the determination of Bpa in food package. A new electrochemical method was developed for the determination of bisphenol A based on carboxylated multi-walled carbon nanotubes modified electrode.