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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 10
BKCSDE 26(10)
October 20, 2005 
 
Title
 Voltammetric Determination of Bisphenol A Using a Carbon Paste Electrode Based on the Enhancement Effect of Cetyltrimethylammonium Bromide (CTAB)
Author
 Wensheng Huang
Keywords
 Surfactant, Enhancement effect, Bisphenol A, Electrochemical detection, Carbon paste electrode
Abstract
 The influence of cetyltrimethylammonium bromide (CTAB) on the electrochemical behavior of bisphenol A at the carbon paste electrode (CPE) was investigated. CTAB, with a hydrophobic C-H chain, can adsorb at the CPE surface via hydrophobic interaction and then change the electrode/solution interface, and finally affects the electrochemical response of bisphenol A, confirming from the remarkable oxidation peak current enhancement. The electrode process of bisphenol A was examined, and then all the experimental parameters which affects the electrochemical response of bisphenol A, such as pH value of the supporting electrolyte, accumulation potential and time, potential scan rate and the concentration of CTAB, were examined. Finally, a sensitive and simple voltammetric method was developed for the determination of bisphenol A. Under the optimum conditions, the oxidation peak current of bisphenol A varied linearly with its concentration over the range from 2.5 × 10-8 to 1 × 10-6 mol/L, and the detection limit was found to be 7.5 × 10-9 mol/L. This method was successfully employed to determine bisphenol A in some waste plastic samples.
Page
 1560 - 1564
Full Text
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