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Citation: Yuanfei Li, Xunfang Yang, Guiling Wang, Ying Guo, Xu Wang, Xinru Li, Yanxia Zhou, Ying Xie. Determination of Surface Tension Isotherm of Phospholipid Solution Using Wilhelmy Method[J]. University Chemistry, ;2023, 38(1): 155-160. doi: 10.3866/PKU.DXHX202201014 shu

Determination of Surface Tension Isotherm of Phospholipid Solution Using Wilhelmy Method

School of Pharmaceutical Sciences, Peking University, Beijing 100191, China

Corresponding author: Ying Xie, bmuxieying@bjmu.edu.cn
Received Date: 7 January 2022

The determination of surface tension isotherm of surfactants is an important experiment of college physical chemistry laboratory. With the wide application of surfactants and the development of scientific instruments, it is necessary to update the experimental system of classical surface tension isotherm measurements. Herein, the surface tension isotherm of distearoyl phosphatidylcholine (DSPC) and dipalmitoyl phosphatidylcholine (DPPC) were determined by interfacial tensiometer, and the important parameters such as surface excess and cross-sectional area of molecules were calculated. An extended experiment was also suggested so as to promote the students’ comprehensive knowledge and cultivate the students’ ability to analyze and solve problems.
- Phospholipid,
- Surface tension isotherm,
- Laboratory teaching
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