Rapid Identification and Verification of Indirubin-Containing Medicinal Plants

Figure 3

HPLC profiles of N,N-dimethyl formamide extract prepared from different organs of medicinal plants and five of their usual adulterants. Each profile was made up of two-three replicate samples from each tested plant organ and species.

(a) Reference substance

(b) Indigo Naturalis

(c) Leaves of P. tinctorium

(d) Leaves of Is. tinctoria

(e) Roots of Is. tinctoria

(f) Leaves of S. cusia

(g) Roots and Rhizomes of S. cusia

(h) Leaves of C. cyrtophyllum

(i) Leaves of P. chinense

(j) Leaves of In. tinctoria

(k) Leaves of S. dimorphotricha

(l) Leaves of P. hydropiper