大学化学2023，Vol.38Issue(12)：257-261,5.DOI:10.3866/PKU.DXHX202305023
比色法测碘酸铜溶度积常数实验的改进
Improvement in Colorimetric Detection of the Solubility Product Constant of Copper(Ⅱ)Iodate
摘要
Abstract
In recent studies,ammonia,a chromogenic reagent,has been used to detect the solubility product constant of copper(Ⅱ)iodate via colorimetry.However,the use of ammonia can result in environmental pollution.As an alternative,glycine can be used as the chromogenic reagent.In this study,the reaction between glycine and copper(Ⅱ)ions was investigated in detail.The reaction time and glycine concentration were optimized by acquiring UV-Vis spectra,determining the appropriate conditions for reacting the copper(Ⅱ)complex with glycine.The absorption intensities at 640 nm for solutions of copper(Ⅱ)ions at different concentrations were measured,and the concentration of copper(Ⅱ)ions in saturated copper(Ⅱ)iodate was determined by using the standard curve.The solubility product constant was calculated,which was close to the literature value.The release of corrosive and volatile gas was prevented in this experiment,and the complex solution could be recycled to prevent environmental pollution.Therefore,this method is green and applicable for use in basic experimental teaching activities.关键词
碘酸铜/溶度积常数/比色法Key words
Copper(Ⅱ)iodate/Solubility product constant/Colorimetry分类
社会科学引用本文复制引用
丁子都,雷英杰,梁云,李襄宏,王炎英,黄涛..比色法测碘酸铜溶度积常数实验的改进[J].大学化学,2023,38(12):257-261,5.基金项目
中南民族大学2019年教学改革重点项目(JYZD19057) （JYZD19057）
教育部民族院校应用化学专业虚拟教研室建设经费(XNYJS2202) （XNYJS2202）
