摘要
采用双等色点光度法测定姜黄素-铁(Ⅱ)络合物的稳定常数并对试验方法进行了改进。采用两种紫外-可见分光光度法设计试验方案,考察了姜黄素的光谱特性,获得姜黄素与铁(Ⅱ)的络合物吸收光谱中两个等色点,姜黄素-铁(Ⅱ)络合物的稳定常数为1.48×1011(pH 6.50),改进后试验方法的稳定常数为1.49×1011。
Dual isosbestic points-spectrophotometry was applied to the determination of stability constant of curcumin-Fe（Ⅱ）complex and the testing method was improved.The spectral characteristics of curcumin were investigated by two experimental programs of UV-visible spectrophotometry.Two isosbestic points were found in the absorption spectra of curcumin-Fe（Ⅱ）complex.The stability constant of the curcumin-Fe（Ⅱ）complex was found as 1.48×1011（at pH 6.50）,and value of stability constant of complex of 1.49×1011 was obtained by the inproved method.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2015年第11期1511-1514,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
国家自然科学基金项目(21375105)
陕西省教育厅科研计划项目(14JK1620)
省级大学生创新训练项目(1647)
