CAJ | 학술논문

用电化学聚合法制备了聚氨基黑10B/Nafion修饰电极,利用循环伏安法研究了多巴胺在此修饰电极上的电化学行为.在磷酸盐缓冲溶液(pH 6.0)中,多巴胺在修饰电极上呈现可逆的氧化还原峰.其峰电位都随pH值的增加而负移.多巴胺氧化还原峰电流与其浓度在0.2～30 μmol/L范围内呈良好的线性关系;检出限为1.0×10~7 mol/L.实验结果表明:本修饰电极具有良好的重现性、稳定性和较强的抗干扰能力.将此修饰电极用于多巴胺注射液和小牛血清中多巴胺的检测,结果令人满意.
용전화학취합법제비료취안기흑10B/Nafion수식전겁,이용순배복안법연구료다파알재차수식전겁상적전화학행위.재린산염완충용액(pH 6.0)중,다파알재수식전겁상정현가역적양화환원봉.기봉전위도수pH치적증가이부이.다파알양화환원봉전류여기농도재0.2～30 μmol/L범위내정량호적선성관계;검출한위1.0×10~7 mol/L.실험결과표명:본수식전겁구유량호적중현성、은정성화교강적항간우능력.장차수식전겁용우다파알주사액화소우혈청중다파알적검측,결과령인만의.
A poly(amino black 10B)/Nafion modified glassy carbon(GC) electrode for the detection of dopamine(DA) has been developed. The modified electrode showed an excellent electrocatalytic effect on the oxidation of DA. In cyclic votammetric measurements, the redox peak current increased linearly with the concentration of DA in the range of 2.0×10~(-7) 3.0×10~(-5) mol/L in PBS of pH 6.0, with a correlation coefficient of 0.9993 and 0.9991, respectively. The detection limit(S/N=3) was 1.0×10~(-7) mol/L. Moreover, the modified electrode exhibited good repeatability and long-time stability, and avoided the interference of ascorbic acid. The modified electrode has been used for the determination of DA in the injections and calf serum with good recovery and reproducibility.