Self-Developed Surface Desorption Atmospheric Pressure Chemical Ionization Mass Spectrometry for Efficient Detection of Unsaturated Fatty Acids in Black Tea
ZHANG Xiao-Ping1**, ZHANG Xing-Lei1, DING Jian-Hua2, LUO Jian-Qiang2
1. Jiangxi Key Laboratory of Mass Spectrometry Science and Instrument,East China University of Technology,Nanchang 330013, China; 2. College of Chemistry and Materials,East China University of Technology,Nanchang 330013,China
Abstract At present,most chemistry teaching experiments are verification-based,which leads to a lack of independent innovation ability among students.To address this issue,starting from the National Standards for Undergraduate Teaching Quality of Chemistry Specialty,we designed a new undergraduate experiment titled“Self-developed surface desorption atmospheric pressure chemical ionization mass spectrometry for efficient detection of unsaturated fatty acids in black tea”.In this experiment,students will independently build an atmospheric corona discharge ionization device to gain a deep understanding of the principles of ionization and epoxidation,thereby stimulating their experimental initiative.The self-made device is simple and fast,significantly reducing teaching costs,avoiding the use of organic reagents,and being environmentally friendly.In this experiment,CC position isomers are identified and quantitatively analyzed by studying the epoxidation reaction of the new active species water radical cations,(H2O)<sup>+·<sub>2,with trans-2-hexenoic acid and trans-3-octenoic acid.This experiment covers basic analytical chemistry operations and organic mass spectrometry skills,cultivates students’ hands-on operation ability,exercises scientific thinking,and is suitable for undergraduate chemistry experiment teaching.
ZHANG Xiao-Ping, ZHANG Xing-Lei, DING Jian-Hua, LUO Jian-Qiang. Self-Developed Surface Desorption Atmospheric Pressure Chemical Ionization Mass Spectrometry for Efficient Detection of Unsaturated Fatty Acids in Black Tea[J]. Chinese Journal of Chemical Education, 2025, 46(6): 34-41.
