摘要
采用电化学聚合法制备了茜素红修饰玻碳电极，该修饰电极对肾上腺素（EP）有明显的电催化特性。在pH7．6的磷酸缓冲溶液（PBS）中，抗坏血酸（AA）和EP在修饰电极上的电位分别为-0．124V和0．192V。电位差达到300mV，且在高浓度AA的存在下可以实现对EP的测定。EP在该电极上检测的线性范围是5．0×10^-7～1．0×10^-4mol／L，检测下限为3．6×10^-8mol／L。该法可用于针剂EP样品测定。
A alizarin red modified glassy carbon electrode was firstly fabricated through electropolymerization. The electrochemical behavior of adrenaline （EP） on the modified electrode was investigated. The results of the experiment showed that the modified electrode exerts an apparent catalytic effect on the EP oxidation. The peak potentials recorded in PBS buffer solution （ pH 7.6 ） were 0. 124 V for AA and 0. 192 V for EP. EP can be detected when the potential was 300 mV in the presence of higher concentration of AA. EP concentration was in a linear relationship with anodic peak current in the range or 5. 0 × 10^-7 - 1.0 × 10^-4mol/L. The determination limit was 3.6 × 10^-8. The modified electrode cab be used for analysing the injection of EP.
出处
《化学分析计量》
CAS
2007年第1期30-32,共3页
Chemical Analysis And Meterage
