利用循环伏安法制备了石墨烯/铂纳米粒子杂化膜修饰电极,并利用该修饰电极研究了肾上腺素(EP)的电化学行为,建立了测定肾上腺素的电化学方法.分别利用扫描电子显微镜和循环伏安法对电极的表面形貌和电化学性能进行了表征,优化了修饰电极制备过程中影响电极性能的条件和EP的测定条件.结果表明,石墨烯/铂纳米粒子修饰电极对肾上腺素有明显的电催化作用.在pH =5.0的柠檬酸-磷酸氢二钠缓冲溶液中,EP的氧化峰电流与其浓度在4.4×10-8～2.2×10-6 mol/L的范围内呈良好的线性关系.线性方程为ipa(10 A) =0.0753c(mol/L) +3.7653×10-5,r=0.9989,检出限为2.2×10-9 mol/L(S/N=3).修饰电极表具有良好的重现性,可用于实际样品的测定.
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