碳纳米管修饰的碳糊铁离子选择性电极的研究

Modified Carbon Paste Iron (Ⅲ)-selective Electrode Based on New Carbon Nanotube

以新型碳纳米管复合物修饰的碳糊铁离子选择性电极被研制出来。电极对Fe3+呈现近Nernst电位响应性能,电极响应的线性范围为1.8×10-8～1.0×10-1mol/L,斜率为26.3 mV/decade,检测下限为0.9×10-9mol/L。电极Fe3+具有良好的选择性,其响应时间为25 s。将此离子选择性电极应用于Fe3+的回收率实验,结果令人满意。

A new modified carbon paste electrode based on carbon nanotube composite as the carrier for selective de- termination of Fe3 ＋ was developed. The electrode presents near - Nernst potential response to Fe^2＋ over a linear range of 1.8 × 10 ^-8 - 1.0 × 10 ^-1 moL/L with a slope of 26.3 mV/decade and detection limit of 0.9 ×10 -6 mol/L. The electrode showeds a good selectivity for Fe3 ＋ and the response time of the electrode was 25 s. The electrode applied to the recovery of determination of Fe3＋ was with satisfactory results.