用循环伏安法制备了聚甘氨酸修饰电极,研究了诱惑红在聚甘氨酸修饰电极上的电化学行为,建立了测定诱惑红的新方法。结果表明:甘氨酸修饰的玻碳电极对诱惑红的电化学行为具有良好的催化性能,此电极可用于诱惑红的检测。在p H=3.0的Na2HPO4-柠檬酸缓冲溶液中,对诱惑红进行测定的线性范围为8.0×10-8~6.0×10-6mol/L;检出限为2.0×10-8mol/L。干扰实验结果表明,一些常见的阳离子以及阴离子对诱惑红的检测无明显干扰。该修饰电极具有良好的灵敏度、选择性和稳定性,可用于食品中诱惑红的检测,结果满意。

The poly-glycine modified electrode was prepared using cyclic voltammetry. The electrochemical behavior of allura red on the poly-glycine modified electrode was studied. Anew method to determineallura red was established. The study results showed thatglycine has good catalytic performance to the allura Red. It can be used in the detection of allura red in p H = 3. 0 disodium hydrogen phosphat-citric acid solution. The linear range for the determination of allurared was from 8. 0 × 10-8to 6. 0 × 106 mol / L and the limit of detection was 2. 0 × 10-8mol / L. Some common metal ions and cations had no obvious effects on the determination of allura red. The modified electrodes demonstrated excellent sensitivity,selectivity,and stability. This method was applied to the determination ofallura redin food with satisfactory results.