کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1166912 | 960518 | 2010 | 5 صفحه PDF | دانلود رایگان |
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 × 10−8 to 5.0 × 10−6 M with a linear coefficiency of 0.997. The detection limit is 3.0 × 10−9 M. The proposed method displayed an excellent sensitivity and was successfully applied to the determination of melamine in milk products.
Journal: Analytica Chimica Acta - Volume 675, Issue 1, 18 August 2010, Pages 24–28