Study of Electrochemical Behavior and Determination of Hydroquinone at Platimum Nanoparticles and Multi-Walled Carbon Nanotubes Modified Glassy Carbon Electrode

Platinum nanoparticles and multi-walled carbon nanotubes modified glassy carbon electrode (Pt/MWCNTs/GCE) was prepared by methods of drop-coating and electrochemical deposition.The electrochemical behavior of hydroquinone at Pt/MWCNTs/GCE was studied by cyclic voltammetry.It was shown that in an acidic solution,a pair of well defined reversible redox peaks given by hydroquinone was observed.Linear relationship between values of oxidation peak current and concentration of hydroquinone was obtained in the range of 1.0×10-6-1.0×10-2mol·L-1,with detection limit of 5.0×10-7mol·L-1.Precision of the method was tested at the concentration level of 1.0×10-3mol·L-1 hydroquinone standard solution for 8 determinations,value of RSD found was 0.10%.On the base of blank sample,test for recovery was made by standard addition method,values of recovery found were in the range of 98.0%-104%.