目的:研究对乙酰氨基酚和抗坏血酸在4-(2-吡啶偶氮)间苯二酚(PAR)导电聚合膜修饰电极上的电化学行为,建立同时测定对乙酰氮基酚和抗坏血酸含量的电化学分析新方法。方法:采用循环伏安法研究对乙酰氨基酚和抗坏血酸在膜修饰电极上的电化...目的:研究对乙酰氨基酚和抗坏血酸在4-(2-吡啶偶氮)间苯二酚(PAR)导电聚合膜修饰电极上的电化学行为,建立同时测定对乙酰氮基酚和抗坏血酸含量的电化学分析新方法。方法:采用循环伏安法研究对乙酰氨基酚和抗坏血酸在膜修饰电极上的电化学行为,以差示脉冲伏安对二者含量进行测定。结果:聚 PAR 膜修饰电极对对乙酰氨基酚和抗坏血酸有很强电催化作用,明显增强了电极反应的可逆性。在 pH 6.0磷酸盐缓冲液中,对乙酰氨基酚氧化峰电流与其浓度在1.0×10^(-8)～1.5×10^(-5),5×10^(-5)～4×10^(-4)mol·L^(-1)范围内呈良好的线性关系,抗坏血酸氧化峰电流与其浓度在1.0×10^(-6)～3.0×10^(-4)mol·L^(-1)范围内呈良好的线性关系,检出限分别为5.0×10^(-9)mol·L^(-1)和5.0×10^(-7)mol·L^(-1)。结论:该修饰电极可以对对乙酰氨基酚和抗坏血酸进行单独或同时的测定,并用于实际样品维 C 银翘片中对乙酰氨基酚和抗坏血酸的含量检测,结果令人满意。展开更多
The electrochemical and catalytic properties of PmClAn modified electrode were studied by cyclic voltammetry. The results showed that PmClAn had an excellent electroactivity and proton doping increased the electroacti...The electrochemical and catalytic properties of PmClAn modified electrode were studied by cyclic voltammetry. The results showed that PmClAn had an excellent electroactivity and proton doping increased the electroactivity. The Pt particles electrodeposited on PmClAn trend towards preferred orientation, and Pt(200) was the preferred face. It was also found that platinized PmClAn promotes isopropanol oxidation, the polymer is not only as a dispersion media of Pt particles forming a "microheterogeneous catalysis system", but also has effect on electronic properties of Pt.展开更多
The Eu（Ⅲ） with 25,27-dibenzyloxy-5,11,17,23-tetra-tert-butyl-26,28-dihydroxycalix[4]-arene film electrode（Eu（Ⅲ）-Calix-2Ar/GC） was firstly prepared. Cyclic voltammetric experiments showed that, in NaClO4 soluti...The Eu（Ⅲ） with 25,27-dibenzyloxy-5,11,17,23-tetra-tert-butyl-26,28-dihydroxycalix[4]-arene film electrode（Eu（Ⅲ）-Calix-2Ar/GC） was firstly prepared. Cyclic voltammetric experiments showed that, in NaClO4 solution, the film electrode has one pair of well defined and relatively stable reduction and oxidation peak. For this pair of peak, Epc=-0.69 V and Epa= -0 47 V（vs. SCE）. Various factors which affect the voltammetry of Eu（Ⅲ）-Calix-2Ar film electrode and the charge transport process of the electrode are discussed. Research showed that the voltammetry of the film electrode is affected by the concentration of supporting electrolyte ,the film thickness, solvent and the film has some properties of supramolecular system.展开更多
文摘目的:研究对乙酰氨基酚和抗坏血酸在4-(2-吡啶偶氮)间苯二酚(PAR)导电聚合膜修饰电极上的电化学行为,建立同时测定对乙酰氮基酚和抗坏血酸含量的电化学分析新方法。方法:采用循环伏安法研究对乙酰氨基酚和抗坏血酸在膜修饰电极上的电化学行为,以差示脉冲伏安对二者含量进行测定。结果:聚 PAR 膜修饰电极对对乙酰氨基酚和抗坏血酸有很强电催化作用,明显增强了电极反应的可逆性。在 pH 6.0磷酸盐缓冲液中,对乙酰氨基酚氧化峰电流与其浓度在1.0×10^(-8)～1.5×10^(-5),5×10^(-5)～4×10^(-4)mol·L^(-1)范围内呈良好的线性关系,抗坏血酸氧化峰电流与其浓度在1.0×10^(-6)～3.0×10^(-4)mol·L^(-1)范围内呈良好的线性关系,检出限分别为5.0×10^(-9)mol·L^(-1)和5.0×10^(-7)mol·L^(-1)。结论:该修饰电极可以对对乙酰氨基酚和抗坏血酸进行单独或同时的测定,并用于实际样品维 C 银翘片中对乙酰氨基酚和抗坏血酸的含量检测,结果令人满意。
文摘The electrochemical and catalytic properties of PmClAn modified electrode were studied by cyclic voltammetry. The results showed that PmClAn had an excellent electroactivity and proton doping increased the electroactivity. The Pt particles electrodeposited on PmClAn trend towards preferred orientation, and Pt(200) was the preferred face. It was also found that platinized PmClAn promotes isopropanol oxidation, the polymer is not only as a dispersion media of Pt particles forming a "microheterogeneous catalysis system", but also has effect on electronic properties of Pt.
文摘The Eu（Ⅲ） with 25,27-dibenzyloxy-5,11,17,23-tetra-tert-butyl-26,28-dihydroxycalix[4]-arene film electrode（Eu（Ⅲ）-Calix-2Ar/GC） was firstly prepared. Cyclic voltammetric experiments showed that, in NaClO4 solution, the film electrode has one pair of well defined and relatively stable reduction and oxidation peak. For this pair of peak, Epc=-0.69 V and Epa= -0 47 V（vs. SCE）. Various factors which affect the voltammetry of Eu（Ⅲ）-Calix-2Ar film electrode and the charge transport process of the electrode are discussed. Research showed that the voltammetry of the film electrode is affected by the concentration of supporting electrolyte ,the film thickness, solvent and the film has some properties of supramolecular system.
