1. School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,China;
2. Institute for Advanced Study, Nanchang University, Nanchang 330031,China
Abstract In this paper, a new titration experiment was designed to detect reducing sugar content in persimmon frostbased on the redox reaction between Fehling's solution and reducing sugar. There comes lots of creation and progress in the Fehling's solution composition, the titration method and the titration result calculation method. And the effects of pH, temperature and amount of Fehling's solution on the color reaction were discussed in details. Finally, the results obtained by the proposed assay were compared with those by iodimetry with satisfactory results. This experiment helps to enhance students' awareness of food safety and improve their ability to analyze multivariable problems. It can replace iodometry and become a new experiment in analytical chemistry experiment.
LV Xiao-Lan, PENG Zou-Jun, RUI Jia-Han, XU Chu-Chu, QIU Ping. Determination of Reducing Sugar Content in Persimmon Frost Based on Fehling's Solution[J]. Chinese Journal of Chemical Education, 2022, 43(20): 62-66.
