摘要
介绍了一个综合探究实验。本实验选取了淀粉和聚乙烯醇(PVA)两种水溶性高分子与I_(2)构成显色体系,通过分光光度法,分别探究不同反应pH、反应温度、反应物浓度、反应时间等对显色结果的影响,从而确定该显色体系的最佳反应条件;进一步绘制出吸光度工作曲线,讨论了该显色体系用于物质定量测量的合理性。
This paper introduces a comprehensive inquiry experiment. Two water-soluble polymers, starch and polyvinyl alcohol(PVA), were selected to form a color developing system with iodine. By spectrophotometry, the effects of different reaction conditions, such as pH, reaction temperature, concentration of reactants and reaction time, on the color rendering results were investigated, and the optimum reaction conditions were determined. The working curve of absorbance was constructed and the application of the color rendering system was discussed. Rationality of quantitative measurement of substances.
作者
刘红瑜
原思浩
金谷
Hongyu Liu;Sihao Yuan;Gu Jin(National Demonstration Center for Experimental Chemistry Education(University of Science and Technology of China),Hefei 230026,China;School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China;School of the Gifted Young,University of Science and Technology of China,Hefei 230026,China)
出处
《大学化学》
CAS
2021年第2期118-124,共7页
University Chemistry
基金
2018年度中国科学技术大学本科教学研究项目(2018xjyxm12)。
