基于铜修饰硝酸根传感器的研究
何蒙蒙;宋小娟;杨慧中
【期刊名称】《传感技术学报》 【年(卷),期】2012(025)009
【摘要】A method based on square wave voltammetry (SWV) to modify glassy carbon electrode with freshly copper to determinate nitrate was described. The parameters such as the electrolyte concentration and the pH of the test solution had significant effects on the corresponding reduction current density. The electrode showed a good linear response of reduction current density to nitrate ions concentration. The experiment results demonstrated that the proposed electrode showed high sensitivity which was 0. 0292A/(mol/L) within a concentration range of 10 jxmol/L ~ 1 000 jxmol/L (R2 =0.9991) ,and was 0.0225A/(mol/L)in the range of 1 000 (jimol/L ~5 500 ujnol/L(tf2 =0.9922). Interference analysis with 7 kinds of ions( NO 2 ,C1- , HPO2-4 , CO2-3 ,SI2-4 ,H2PO4 ,PO3-4 ,) commonly found in surface water indicated that the electrode in this paper had good selectivity to NO3. The electrode developed by SWV was important for further study of monitoring nitrate ions in natural water.%基于方波伏安法制备铜层修饰玻碳电极,同时利用新鲜的敏感铜膜催化还原硝酸根.讨论了电解质及pH值等参数对硝酸根还原电流的影响.硝酸根离子的浓度与还原电流密度呈良好的线性关系,峰电流与硝酸根离子浓度在10 μmol/L～1000 μmol/L浓度范围内,灵敏度为
基于铜修饰硝酸根传感器的研究
