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采用原位还原法制备金纳米粒子/聚多巴胺/碳纳米管(Au-PDA-MWCNTs)复合材料,并将其用于建立高灵敏检测核黄素(RF)的电化学方法.采用紫外-可见光谱、扫描电镜、X-射线能谱对Au-PDA-MWCNTs复合材料进行表征,采用循环伏安法和差示脉冲伏安法探讨核黄素在Au-PDA-MWCNTs修饰的玻碳电极上的电化学行为,并对RF含量进行测定.该方法对核黄素的检测在5×10~(-9)~1×10~(-5)mol·L~(-1)范围内呈良好线性关系(R=0.9906),检测限为1.7×10~(-9)mol·L~(-1).方法操作简便、抗干扰能力强,并成功实现了维生素药片中RF含量的测定.
Gold nanoparticle / polydopamine / carbon nanotubes (Au-PDA-MWCNTs) composites were prepared by in-situ reduction method and used to establish electrochemical method for highly sensitive detection of riboflavin (RF) .Using UV- The morphology of Au-PDA-MWCNTs composites was characterized by X-ray diffraction, XRD, SEM, EDS and cyclic voltammetry. The cyclic voltammetry and differential pulse voltammetry were used to investigate the effect of riboflavin on Au-PDA-MWCNTs modified glassy carbon electrode Electrochemical behavior and determination of RF content were investigated.The detection of riboflavin showed good linearity in the range of 5 × 10 -9 to 1 × 10 -5 mol·L -1 (R = 0.9906), the detection limit was 1.7 × 10 -9 mol·L -1 .The method was simple and easy to operate with strong anti-interference ability, and the determination of RF content in vitamin tablets was successfully achieved.