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
Five amido thiol tin compounds, bis N,N dialkylaminocarbonylethyl tin bis iso octyl sufenylacetates, were prepared by reacting esters thiol tin or ester tin dichloride with secondary amines. The structures of the comp...Five amido thiol tin compounds, bis N,N dialkylaminocarbonylethyl tin bis iso octyl sufenylacetates, were prepared by reacting esters thiol tin or ester tin dichloride with secondary amines. The structures of the compounds were determined by IR, 1H NMR , 119 Sn NMR and elemental analysis. The new compounds have a good heat stability for PVC resin, among them bis N,N dihydroxyethylaminocarbonylethyl tin bis iso octyl sufenylacetate is the best one.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.
文摘为建立2-二乙氨基乙硫醇含量检测的气相色谱法,采用氢火焰离子检测器,分流进样,分流比25∶1,设定程序升温,用面积归一化法进行计算。2-二乙氨基乙硫醇在浓度0.1~0.6 g/mL范围内与峰面积具有良好的线性关系,线性方程为Y =2.0×107 X -3.1×105,相关系数R2为0.9981,精密度测试中重复性的RSD为0.03%,中间精密度的RSD为0.30%。本方法简便、准确,重现性好,可用于2-二乙氨基乙硫醇的含量测定。
文摘Five amido thiol tin compounds, bis N,N dialkylaminocarbonylethyl tin bis iso octyl sufenylacetates, were prepared by reacting esters thiol tin or ester tin dichloride with secondary amines. The structures of the compounds were determined by IR, 1H NMR , 119 Sn NMR and elemental analysis. The new compounds have a good heat stability for PVC resin, among them bis N,N dihydroxyethylaminocarbonylethyl tin bis iso octyl sufenylacetate is the best one.