期刊论文

中文

衡阳师范学院学报

1673-0313

2016

37

03

169-172

10.13914/j.cnki.cn43-1453/z.2016.03.039

(21472038,21505035):国家自然科学基金项目 :湖南省大学生研究性学习和创新性实验计划项目(2014年) (XJK011CGD033):湖南省十二五规划课题 (12CXYZ02):衡阳师范学院产学研用重点培育项目

本校为第一机构

用柠檬酸钠还原法合成了纳米金(AuNPs),制备了纳米金修饰碳糊电极(AuNPs/CPE),并研究了香兰素在该修饰电极上的电化学行为,釆用循环伏安法和差分脉冲法进行分析,建立了一种测定香兰素的新方法.结果表明,在pH＝3.50的PBS缓冲溶液中,从0.2 V~1.0 V范围内以100 mV/s的扫描速率扫描,于770 mV (vs.SCE)处产生一灵敏的氧化峰,其峰电流与香兰素的浓度在1×10－9~5×10－8,5×10－8~2×10－6和2×10－6~5×10－5内均呈现良好的线性关系,检出限(S/N＝3)为5.4×10－10 mol·L－1.该修饰电极制备简便,测定香兰素快速、灵敏、选择性高.应用此法分析了巧克力中香兰素的含量,结果满意.

The gold nanoparticles were successfully synthesized by using sodium citrate as a reducing agent.A gold nanoparticles modified carbon paste electrode (AuNPs/CPE)was fabricated and the electrochemical behavior of vanillin at the modified elec-trode was investigated,a new method for the determination of trace vanillin was described.It was found that in pH 3.50 PBS buffer solution,When scanning linearly was from 0.2 V to 1.0 V at a scan rate of 100 mV/s,the sensitive anodic peak ap-peared at 770 mV (vs.SCE),The linear range was found to be 1×10-9...