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Electrochemical Sensing of Melamine with 3,4-Dihydroxyphenylacetic Acid as Recognition Element by Qian Cao; Hong Zhao; Yujian He; Nan Ding; Jian Wang is a Chemistry article available to read on EtoBox.

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A new electrochemical sensor for melamine with 3,4-dihydroxyphenylacetic acid as the recognition element is established. The results of Fourier Transform Infrared (FT-IR) spectra demonstrate that melamine may interact with 3,4-dihydroxyphenylacetic acid to form a complex mainly through the hydrogen-bonding interaction. The electrochemical behavior of 3,4-dihydroxyphenylacetic acid in the presence of melamine was studied. The anodic peak currents of 3,4-dihydroxyphenylacetic acid obtained by differential pulse voltammetry are linear with the logarithm of melamine concentrations in the range from 1.0 x 10(-8) to 5.0 x 10(-6) M with a linear coefficiency of 0.997. The detection limit is 3.0 x 10(-9) M. The proposed method displayed an excellent sensitivity and was successfully applied to the determination of melamine in milk products.

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Author

Qian Cao; Hong Zhao; Yujian He; Nan Ding; Jian Wang

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

2010

Language

EN

Field

Chemistry (Physical Sciences)