CAJ | 학술논문

研究了聚中性红(PNR)/碳纳米管(CNT)修饰玻碳电极(GC)的制备方法,并采用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了多巴胺(DA)在聚中性红/碳纳米管修饰电极(PNR/CNTE)上的伏安行为,以及在抗坏血酸(AA)存在下DA的测定条件.在含一定浓度 AA的磷酸缓冲溶液(pH =6.0)中, DA的还原峰电流与浓度在2.6×10?5～1.0×10?3 mol/L范围内呈线性关系,线性相关系数为γ=0.9987,检测限为2.0×10?6 mol/L.利用该修饰电极对样品进行检测,8次平行测定结果的相对标准偏差为1.8％,样品回收率在96.0%～104.3%范围内,满足微量分析的要求.
연구료취중성홍(PNR)/탄납미관(CNT)수식파탄전겁(GC)적제비방법,병채용순배복안법(CV)화차분맥충복안법(DPV)연구료다파알(DA)재취중성홍/탄납미관수식전겁(PNR/CNTE)상적복안행위,이급재항배혈산(AA)존재하DA적측정조건.재함일정농도 AA적린산완충용액(pH =6.0)중, DA적환원봉전류여농도재2.6×10?5～1.0×10?3 mol/L범위내정선성관계,선성상관계수위γ=0.9987,검측한위2.0×10?6 mol/L.이용해수식전겁대양품진행검측,8차평행측정결과적상대표준편차위1.8％,양품회수솔재96.0%～104.3%범위내,만족미량분석적요구.
The preparation of Poly(neutral red)/carbon nanotubes modifide electrode were studied. In phosphate buffer solution (PBS pH=6.0), Cyclic Voltammetry (CV) and Differential Pulse Voltammegroms (DPV) were used to study the electrochemical behavior of the Poly(neutral red)/carbon nanotubes film modified electrodes(for short PNR/CNTE). The reduction peak current was proporational to the concentration of dopamine (DA) over the ranges from 2.6 × 10?5 to 1.0 × 10?3 mol/L. The linear correlation coffcient was 0.998 7 and the detection limit of 2.0 × 10?6 mol/L was obtained. The relative standard deviation of eight samples analysis results was 1.8%, so the method meet the demand of microanalysis.