کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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59774 | 1419444 | 2014 | 8 صفحه PDF | دانلود رایگان |
A multiwall carbon nanotube modified electrode prepared by incorporating multiwall carbon nanotubes in the electrode of a sensor and naphthol green as a homogeneous mediator was used as a voltammetric sensor for the determination of N-actylcysteine (N-AC) in the presence of tryptophan (Trp). The voltammograms of differential pulse voltammetry of N-AC in a mixture with Trp were separated from each other by a potential difference of 200 mV, which allowed the determination of both N-AC and Trp simultaneously. Under the optimum conditions, the electrocatalytic currents increased linearly with N-AC concentration in the range of 0.25–400 μmol/L (two linear segments with different slopes). The detection limit for N-AC was 0.08 μmol/L. The kinetic parameters of the system were determined using electrochemical methods. The method was applied for the determination of N-AC in drug and urine samples.
Graphical AbstractA modified multiwall carbon nanotube paste electrode with naphthol green as a mediator was used as a voltammetric sensor for the selective determination of N-actylcysteine and tryptophan.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Catalysis - Volume 35, Issue 4, April 2014, Pages 501–508