Determination of Oleanolic and Ursolic Acids in <i>Hedyotis diffusa</i> Using Hyphenated Ultrasound-Assisted Supercritical Carbon Dioxide Extraction and Chromatography

<div>Effect of dynamic extraction time on the extraction yields of OA and UA from<i> H. diffusa</i> using HSC–CO<sub>2</sub> and SC–CO<sub>2</sub> extractions. Conditions: 0.355 mm, 56°C, 28.2 MPa, 2.3 mL/min, and 12.5% cosolvent (82% aqueous ethanol).</div>

Evidence-Based Complementary and Alternative Medicine

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Figure 4: Determination of Oleanolic and Ursolic Acids in <i>Hedyotis diffusa</i> Using Hyphenated Ultrasound-Assisted Supercritical Carbon Dioxide Extraction and Chromatography 

Figure 4 | Determination of Oleanolic and Ursolic Acids in Hedyotis diffusa Using Hyphenated Ultrasound-Assisted Supercritical Carbon Dioxide Extraction and Chromatography 