A novel approach to quality evaluation of root of Scutellaria baicalensis by DPPH free radical scavenging / 中国中药杂志

<p><b>OBJECTIVE</b>To develop a simple, reliable approach for evaluating the quality of Huangqin (Scutellaria baicalensis).</p><p><b>METHOD</b>To determine the DPPH free radical scavenging activity and assay of four bioactive components: baicalin, baicalein, wogonin and wogonin-7-O-glucuronide by HPLC.</p><p><b>RESULT</b>The correlative relationship between DPPH free radical scavenging activity and baicalin content was obtained.</p><p><b>CONCLUSION</b>Bioassay of DPPH free radical scavenging activity could be used as one of the methods for quality evaluation of Chinese drug Huangqin.</p>