复合纳米材料修饰电极检测抗坏血酸与亚硝酸根

Simultaneous Determination of Ascorbic Acid and Nitrite Graphene and Carbon Nanotubes Composite Modified Electrode

制备了石墨烯（GO）与碳纳米管（MWNT）复合材料修饰玻碳电极,在浓度为0.1 mol/L、p H为5.5的磷酸缓冲溶液（PBS）中,探讨了抗坏血酸（AA）和亚硝酸根（NO-2）在石墨烯与碳纳米管复合材（GO-MWCNTs）料修饰玻碳电极上的电化学行为。结果表明,抗坏血酸和亚硝酸根在该修饰电极上氧化电流可得到明显增强。利用计时电流法测定抗坏血酸与亚硝酸根,抗坏血酸和亚硝酸根氧化电流呈线性关系的浓度范围分别为3.00×10-6~4.06×10-3mol/L和7.44×10-5~3.28×10-3mol/L。

The preparation of a glassy carbon electrode modified graphene and carbon nanotubes composites, when the concentration was 0. 1 mol/L, pH = 4, the ascorbic acid and nitrite in graphene and carbon nanotubes composite materials modified glassy carbon electrode and its electrochemical behavior were discussed. The results showed that ascorbic acid and nitrite in this modified electrode could be obviously enhanced oxidation current. The determination of ascorbic acid and nitrite chronoamperometry, ascorbic acid and nitrite oxidation current was linear over the concentration range of 3.00 × 10-6 ~ 4.06 × 10-3 mol/L and 7.44 × 10-5 ~ 3.28 ×10-3 mol/L, respectively.