Citation: Minli Gao, Borui He, Jiaxin Dong, Chengying Fei, Shufan Fu, Jiaxin Ding, Siyi Gu, Hanyang Li, Jiayuan Li, Zuwang Ding, Jingkang Ding, Xingrui Heng, Fei Ding, Langxing Chen, Yizhou Zhu, Jing Wang. The Application of “Self-Designed Experiment” Teaching Mode in the Instrumental Analysis Experiment: Determination of Metal Elements in Tea by ICP-OES[J]. University Chemistry, ;2023, 38(10): 235-242. doi: 10.3866/PKU.DXHX202301036 shu

The Application of “Self-Designed Experiment” Teaching Mode in the Instrumental Analysis Experiment: Determination of Metal Elements in Tea by ICP-OES

Minli Gao ^1,3 ,
Borui He ^1,3 ,
Jiaxin Dong ^1,3 ,
Chengying Fei ^1,3 ,
Shufan Fu ^1,3 ,
Jiaxin Ding ^1,3 ,
Siyi Gu ^1,3 ,
Hanyang Li ^1,3 ,
Jiayuan Li ^1,3 ,
Zuwang Ding ^1,3 ,
Jingkang Ding ^1,3 ,
Xingrui Heng ^1,3 ,
Fei Ding ^1,2 ,
Langxing Chen ¹ ,
Yizhou Zhu ¹ ,
Jing Wang ^1,2,,

1.
College of Chemistry, Nankai University, Tianjin 300071, China;
2.
National Demonstration Center for Experimental Chemistry Education, Nankai University, Tianjin 300071, China;
3.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Corresponding author: Jing Wang, wangjing844@nankai.edu.cn
Received Date: 28 January 2023
Revised Date: 1 March 2023

Instrument analysis experiment is an important practical course. It’s the basis for cultivating students’ innovative awareness and improving students’ comprehensive quality. “Self-designed experiment” adheres to the principal position of students, guides students to consult literature and formulate experimental plans by themselves. It effectively integrates the key points of knowledge into the experimental process under the assistance and guidance of teachers, so as to deepen the theoretical learning and the practical application. In this experiment, inductively coupled plasma optical emission spectrometry (ICP-OES) was used to determine the content of metal elements in different kinds of tea. The influence of soaking time and the number of soaking on the dissolution of metal elements was investigated to identify whether it met the requirements of national standards, and the existing literature data were compared to supplement and improve. It provides the theoretical basis and guidance for people to choose the way of brewing tea. “Self-designed experiment” closely links chemistry with daily life, stimulates students’ learning enthusiasm and exploration spirit, aims to strengthen students’ experimental operation ability and autonomous learning ability, and enhance students’ innovative awareness and practical spirit.
- Instrumental analysis experiment,
- Teaching reform,
- Self-designed experiments,
- Inductively coupled plasma optical emission spectrometry,
- Tea,
- Metal elements
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