用酰腙席夫碱镍配合物/多壁碳纳米管修饰玻碳电极测定NO_2^-  

Determination of Nitrite with a Pyridine Formex-hydrazone Nickel Complex/MWCNTs Modified Glassy Carbon Electrode

作　　者：张齐军[1] 刘峥[2] 张小鸽[2] 袁帅[2] 韦东[2] 

机构地区：[1]广西工业职业技术学院食品与生物工程系,广西南宁530001 [2]桂林理工大学化学与生物工程学院,广西桂林541004

出　　处：《分析科学学报》2013年第2期257-260,共4页Journal of Analytical Science

摘　　要：制备了一种新型3-吡啶甲酰腙丙酮酸席夫碱镍配合物/多壁碳纳米管修饰玻碳电极(NiL/MWCNTs/GCE),考察了NiL/MWCNTs/GCE对NO2-的电催化氧化行为。结果表明,在pH=7.8～8.0的磷酸盐缓冲溶液中,富集时间为5s,其扫速为0.1V/s,在-1.0～1.6V进行循环伏安扫描,该电极对NO2-具有较好的电催化氧化作用,其氧化峰电流与NO2-浓度在4.0×10-3～1.2×10-2 mol/L范围内呈线性关系,检出限为1.4×10-3 mol/L。将该电极应用于火腿肠中NO2-含量的测定,回收率为94.58%～100.36%。A pyridine formex-hydrazone mickel complex/MWCNTs modified glass carbon electrode（Nil./ MWCNTs/GCE） was preparcd and applied for the determination of nitrite ion. The modified electrode showed electrocatalytic capability on the oxidation of nitrite ion. It was found that the peak current had a linear relationship with the corcentration of nitrite ion in the range of 4.0×10 3-1.2× 10 2 mol/L with a detection limit of 1.4× 10 a mol/L. The modified electrode was used for the detection of nitrite in ham sausage with recoveries of 94.58%-100. 36%

关 键 词：配合物 修饰玻碳电极 循环伏安 NO2- 

分 类 号：O657.15[理学—分析化学]