Fig. 3

The differences of DL properties between authentic and adulterated herbal materials. a1 Salviae miltiorrhizae radix et rhizoma (fragmented materials); a2 Dipsaci radix (fragmented materials); a3 DL decay curves. Data are plotted as the mean ± SEM. Note that the data are plotted on a log–log scale; a4 Histograms comparing the DL properties among samples. Mean ± SD, *p < 0.05; b1 Peucedani radix (sliced materials); b2 Saposhnikoviae radix (sliced materials); b3 DL decay curves. Data are plotted as the mean ± SEM. Note that the data are plotted on a log–log scale; b4 Histograms comparing the DL properties among samples. Mean ± SD, *p < 0.05