Related Experiment Video
Updated: Aug 19, 2026
Extraction and Analysis of Taiwanese Green Propolis
Published on: January 7, 2019
[Quantitative determination of ethyl-p-hydroxybenzoate in resins extracted from Dracaena cochinchinensis with two
Yue-ying Song1, Qing-yun Zhang, Ying-qing Hu
1Medical College of Chinese People's Armed Police Forces, Tianjin, 300162, China.
Objective:
Quantitative determination was made of ethyl-p-hydroxybenzoate in Dracaena cochinchinensis extracted with two technologies.
Method:
The sample was resolved with methanol and isolated by TLC, purged with methanol. Tge sample solution was chroma to graphed on a C18 column with acetonitrile-1% acetic acid (31:69) as mobile phase, detecting at 257 nm and content was calculated with external standard method.
Result:
The standard curves of ethyl-p-hydroxybenzoate were linear in the range of 0.206-4.12 ng, r = 0.9998. The average recovery was 97.2% and RSD was 1.4%.
Conclusion:
The content of ethyl-p-hydroxybenzoate in D. cochinchinensis extracted with heating-tree technongy is higher than that with traditional technology.
