利用分子自组装技术制备氨基乙硫醇修饰金电极,并采用脉冲伏安法直接测定芦丁的含量.以pH 7.0的乙醇和磷酸盐混合缓冲溶液作底液,芦丁在氨基乙硫醇修饰金电极上于0.19 V （vs.SCE）处呈现一灵敏的氧化电流峰,峰电流和芦丁的浓度在8.0～2...利用分子自组装技术制备氨基乙硫醇修饰金电极,并采用脉冲伏安法直接测定芦丁的含量.以pH 7.0的乙醇和磷酸盐混合缓冲溶液作底液,芦丁在氨基乙硫醇修饰金电极上于0.19 V （vs.SCE）处呈现一灵敏的氧化电流峰,峰电流和芦丁的浓度在8.0～2.5×102 μmol/L范围内呈良好的线性关系.由于抗坏血酸在氨基乙硫醇修饰金电极上的氧化电位出现显著负移,因此,可避免抗坏血酸对芦丁检测的干扰.本方法可以不经预分离直接检测药物中芦丁含量.展开更多
Mercaptobenzothiozol self-assembled monolayer modified electrode was fabricated successfully,and cylic voltammetry and scanning electronic microscopy were used to characterize the SAMs modified electrode.The electroch...Mercaptobenzothiozol self-assembled monolayer modified electrode was fabricated successfully,and cylic voltammetry and scanning electronic microscopy were used to characterize the SAMs modified electrode.The electrochemical behaviors of emtol and P-benzenediol were studied on the SAMs in Britton-Robinson buffer solution.The results of the experiments indicate that metol and p-benzenediol can be catalyzed on the SAMs.They can not only be determined singleness but also be determined in mixture simultaneously and doesn’t interfere with each other in a large range of concentration.This method has been used to determine metol and P-benzenediol in waste photographic imaging agent with satisfactory results.展开更多
文摘利用分子自组装技术制备氨基乙硫醇修饰金电极,并采用脉冲伏安法直接测定芦丁的含量.以pH 7.0的乙醇和磷酸盐混合缓冲溶液作底液,芦丁在氨基乙硫醇修饰金电极上于0.19 V （vs.SCE）处呈现一灵敏的氧化电流峰,峰电流和芦丁的浓度在8.0～2.5×102 μmol/L范围内呈良好的线性关系.由于抗坏血酸在氨基乙硫醇修饰金电极上的氧化电位出现显著负移,因此,可避免抗坏血酸对芦丁检测的干扰.本方法可以不经预分离直接检测药物中芦丁含量.
文摘Mercaptobenzothiozol self-assembled monolayer modified electrode was fabricated successfully,and cylic voltammetry and scanning electronic microscopy were used to characterize the SAMs modified electrode.The electrochemical behaviors of emtol and P-benzenediol were studied on the SAMs in Britton-Robinson buffer solution.The results of the experiments indicate that metol and p-benzenediol can be catalyzed on the SAMs.They can not only be determined singleness but also be determined in mixture simultaneously and doesn’t interfere with each other in a large range of concentration.This method has been used to determine metol and P-benzenediol in waste photographic imaging agent with satisfactory results.
