Corresponding Author

Xia-Qin WU


The electrochemical behaviors of rutin and ascorbic acid at single-wall carbon nanotube and polyelectrolytes (dimethyl-diallylammonium chloride, PDDA) film modified glassy carbon electrode was investigated. The cyclic voltammetric results showed that electron transfer of rutin at PDDA/SWCNTs/GC modified electrode is an adsorption-controlled process. The separation of oxidation peak potentials of rutin and ascorbic acid was more than 200 mV. The rutin concentration in the presence of AA were detected by differential pulse voltammetry (DPV). The experimental results indicated that the PDDA/SWCNTs/GC modified electrode can be used for the detection of rutin in the presence of high concentration of AA. The DPV results showed that the oxidation peak current of rutin versus its concentration had a good linearity in the range of 2.5~110 ?mol/L with a correlation coef?cient of 0.9914. The detection limit was 0.5 ?mol/L. The proposed method had been successfully applied to the detection of compound rutin tablets.

Graphical Abstract


Rutin, ascorbic acid, Polyelectrolytes, carbon nanotubes, modified electrode

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