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采用滴涂法和电化学共沉积法制备了纳米Pt-Au和多壁碳纳米管(MWCNTs)修饰玻碳电极(纳米Pt-Au/MWCNTs/GCE),采用循环伏安法(CV)研究了亚硫酸根在纳米Pt-Au/MWCNTs/GCE上的电化学行为。结果表明:在磷酸盐缓冲溶液(PBS)中,亚硫酸根在纳米Pt-Au/MWCNTs/GCE上产生了较明显的氧化峰。亚硫酸根的氧化峰电流与亚硫酸根的浓度在1.0×10~(-6)~2.0×10~(-3) mol/L的范围内呈现良好的线性关系(r=0.9936),检出限为1.0×10~(-7) mol/L(S/N=3)。该检测方法灵敏、简便、线性范围宽,可以用于实际样品中亚硫酸根的测定。
Nanostructured Pt-Au and MWCNTs modified glassy carbon electrodes (Pt-Au / MWCNTs / GCE) were prepared by a drop-coating method and an electrochemical deposition method. Cyclic voltammetry (CV) Electrochemical Behavior of Sulfite on Nanostructured Pt-Au / MWCNTs / GCE. The results showed that sulfite produced a more pronounced oxidation peak on nano-Pt-Au / MWCNTs / GCE in phosphate buffer solution (PBS). The oxidation peak of sulfite showed a good linear relationship with the concentration of sulfite in the range of 1.0 × 10 -6 -6.0 × 10 -3 mol / L (r = 0.9936) The limit is 1.0 × 10 -7 mol / L (S / N = 3). The detection method is sensitive, simple and has a wide linear range and can be used for the determination of sulfite in actual samples.