Fig. 1From: Simultaneous determination of brazilin and protosappanin B in Caesalpinia sappan by ionic-liquid dispersive liquid-phase microextraction method combined with HPLCHPLC chromatograms of reference substance and test solution. A, Test solution of Caesalpinia sappan; B, mixed standard substance; Peak 1, brazilin; Peak 2, protosappanin BBack to article page