利用循环伏安法（CV）制备了银和亮氨酸聚合物膜修饰电极（Ag - Leu / GCE）。研究表明，电极对 NE 的电化学氧化具有明显的催化作用。氧化峰电流与去甲肾上腺素浓度在2.4×10-7-4.8×10-5 mol/ L 范围内呈线性关系，检出限（3S...利用循环伏安法（CV）制备了银和亮氨酸聚合物膜修饰电极（Ag - Leu / GCE）。研究表明，电极对 NE 的电化学氧化具有明显的催化作用。氧化峰电流与去甲肾上腺素浓度在2.4×10-7-4.8×10-5 mol/ L 范围内呈线性关系，检出限（3S/ N）为1.2×10-8 mol/ L。修饰电极用于药物中去甲肾上腺素的测定，加标回收率在97.5％-101.3％之间。展开更多
Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support,in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes o...Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support,in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes on this basis.In situ oxidation conditions experimental results show that the best condition for preparing the TiO2-Al2O3/Ti composite membrane is under 800°C for 2 h,and the microstructure and pore sizes of the TiO2-Al2O3/Ti composite membranes are affected obviously.The thickness and composition of the TiO2/Ti composite membranes are determined by SEM and XRD completely.The pore size distribution of the composite membrane is measured by bubble pressure method,the most probable aperture is about 3.12μm,while the average pore size of defect free TiO2-Al2O3/Ti is about 3.23μm.After ultrasonic treatment,the slight weight change of membranes reveals no observable change,which indicates that TiO2-Al2O3/Ti composite membranes maintain a good stability.展开更多
文摘利用循环伏安法（CV）制备了银和亮氨酸聚合物膜修饰电极（Ag - Leu / GCE）。研究表明，电极对 NE 的电化学氧化具有明显的催化作用。氧化峰电流与去甲肾上腺素浓度在2.4×10-7-4.8×10-5 mol/ L 范围内呈线性关系，检出限（3S/ N）为1.2×10-8 mol/ L。修饰电极用于药物中去甲肾上腺素的测定，加标回收率在97.5％-101.3％之间。
基金Projects(212006065,21666018)supported by the National Natural Science Foundation of China
文摘Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support,in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes on this basis.In situ oxidation conditions experimental results show that the best condition for preparing the TiO2-Al2O3/Ti composite membrane is under 800°C for 2 h,and the microstructure and pore sizes of the TiO2-Al2O3/Ti composite membranes are affected obviously.The thickness and composition of the TiO2/Ti composite membranes are determined by SEM and XRD completely.The pore size distribution of the composite membrane is measured by bubble pressure method,the most probable aperture is about 3.12μm,while the average pore size of defect free TiO2-Al2O3/Ti is about 3.23μm.After ultrasonic treatment,the slight weight change of membranes reveals no observable change,which indicates that TiO2-Al2O3/Ti composite membranes maintain a good stability.
