摘要
在空白玻碳电极上用电化学方法研制了聚组氨酸/镍复合膜(PHis/Ni),实验证明该复合膜修饰电极上存在氧化还原中心Ni(Ⅲ)/Ni(Ⅱ)。用循环伏安法初步探讨了该复合膜的电化学性质及其对甲醛的电催化氧化作用。碱性条件下,用线性扫描溶出伏安法测得在5.0×10-7～2.0×10-5mol/L的范围内,甲醛氧化峰电流与甲醛浓度呈良好的线性关系,检测下限为2.3×10-8mol/L。该修饰电极可用于测定水溶液中甲醛的含量。
The polyhistidine - Ni film modified electrode has been prepared at bare GC, and its electrochemical behavior was studied by cyclic vohammetry. The experiments confirmed the electrochemical catalytic oxidation of formaldehyde on the modified electrode. Over the rang 5.0 × 10^-7 - 2. 0 × 10^-5 mol/L, the peak currents are linearly proportional to the concentration of formaldehyde, the detection limit is 2.3 × 10^- 8 mol/L. The modified electrode can be used to measure formaldehyde in aqueous solution.
出处
《化学传感器》
CAS
2007年第1期49-53,共5页
Chemical Sensors
关键词
甲醛
电催化氧化
聚组氨酸镍复合膜
修饰电极
formaldehyde
electrochemical catalytic oxidation
polyhistidine - Ni film
modified electrode
