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[Quantitative determination of vanillic acid in rhizoma Picrorhizae by TLC-scanning]
1Institute of Traditional Chinese Medicine and Materia Medica of Jiangxi Province, Nanchang 330077.
Abstract
Objective:
To establish a method to determine the content of vanillic acid in Rhizoma Picrorhizae.
Method:
The content was determined by dual wavelength TLC-scanning.
Result:
The peak area of vanillic acid is reproducible in 4 hours; recovery 96.5%; RSD-3%; RSD of duplicate experiment-5%.
Conclusion:
A thin-layer chromatographic scanning method has been developed for determining the content of vanillic acid. The method is reproducible, workable and reliable.

