Comparison between HPLC and HPTLC-densitometry for the determination of harpagoside from Harpagophytum procumbens CO2-extracts

The harpagoside contents of 15 different CO2-extracts were compared by HPLC and HPTLC-densitometry. The quantitative results of both analytical methods did not show any statistical significance between each other, although a trend to slightly lower mean values could be found for the HPTLC method.