Study on Quality Standard of Processed Curcuma Longa Radix

Figure 1

HPLC of reference substance (a), Curcuma Longa Radix sample (b), and negative control sample (c). (1) Bisdemethoxycurcumin, (2) demethoxycurcumin, and (3) curcumin.

(a)

(b)

(c)