Undergraduate Comprehensive Chemistry Experiment for Determination of Ascorbic Acid in Fruits by Electrochemical Method
HAI Bo2, YUAN Song-Yuan1, HUANG Hao-Ran1, WEI Hang1
1. College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China;
2. College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
Abstract The electrochemical detection method was introduced into the undergraduate teaching experiment, and a comprehensive exploratory experiment was conducted to detect the ascorbic acid content in fruits by cyclic voltammetry. Multi-walled carbon nanotubes were used as active materials, and the chemical composition was characterized by infrared spectroscopy. Moreover, the morphology of the multi-walled carbon nanotubes was characterized by transmission electron microscopy. The oxidation reaction of ascorbic acid on the electrode surface was used to quantitatively determine the ascorbic acid content in fruits by cyclic voltammetry curve. The experimental materials are common in life, which can improve students' enthusiasm for participation. The electrochemical theory is systematic, which helps students to flexibly grasp the electrochemical knowledge in textbooks. It involves some large scientific research instruments to help students learn and understand how to use and the working mechanism of instruments, which can improve students' enthusiasm for research. This experiment can be opened as a comprehensive experiment for undergraduates majoring in chemistry and chemical engineering.
HAI Bo, YUAN Song-Yuan, HUANG Hao-Ran, WEI Hang. Undergraduate Comprehensive Chemistry Experiment for Determination of Ascorbic Acid in Fruits by Electrochemical Method[J]. Chinese Journal of Chemical Education, 2019, 40(22): 36-41.
