CAJ | 학술논문

利用含有连续腺嘌呤碱基模块的DNA( CA DNA)构建了双层纳米金,在此基础上制备了由聚番红花红和双层三维分布的纳米金修饰的玻碳电极,并研究了多巴胺( DA)在此修饰电极上的电化学行为,发现对于DA的氧化,CA DNA构建的电极比巯基DNA构建的电极能够起到更明显的电催化作用。利用差分脉冲法(DPV)考察了DA测定的优化条件,并发现其浓度在8．0×10-9~1．2×10-6mol·L-1范围内与氧化峰电流呈良好的线性关系。该电极用于实际样品的测定,结果满意。
이용함유련속선표령감기모괴적DNA( CA DNA)구건료쌍층납미금,재차기출상제비료유취번홍화홍화쌍층삼유분포적납미금수식적파탄전겁,병연구료다파알( DA)재차수식전겁상적전화학행위,발현대우DA적양화,CA DNA구건적전겁비구기DNA구건적전겁능구기도경명현적전최화작용。이용차분맥충법(DPV)고찰료DA측정적우화조건,병발현기농도재8．0×10-9~1．2×10-6mol·L-1범위내여양화봉전류정량호적선성관계。해전겁용우실제양품적측정,결과만의。
DNA with consecutive adenine block( CA DNA) was firstly applied to construct three-dimensional distributed gold nanao-particles(3D GNPs). Based on this,3D GNPs,which were anchored with poly( safranine T) and DNA,modified electrode was pre-pared. The electrochemical behavior of dopamine(DA)at this modified electrode was also investigated. It was found that the CA DNA modified electrode shows a better electrocatalytic activity for the oxidation of DA than that at mercapto-DNA. The optimum conditions of DA determination were studied by differential pulse voltammetry( DPV) and it was found that the linear relationship between oxidation peak current and concentration was in the linear range of 8. 0×10-9 ~1. 2×10-6mol·L-1. The modified electrode can be applied to the determination of DA in the practical injection samples with satisfactory results.