Fig. 5From: Study on health hazards through medicines purchased on the Internet: a cross-sectional investigation of the quality of anti-obesity medicines containing crude drugs as active ingredientsAbsorbance spectrum of the peaks that appeared in HPLC analyses under Method 2. The absorbance spectrum of five types of peaks appeared in the chromatogram of item number 14 (1–5) and the extract of rhubarb rhizome (a–e); reference standards of aloe-emodin (i), rhein (ii), emodin (iii), and chrysophanol (iv) are shownBack to article page