摘要
目的建立黄芩特征化学成分和抗氧化活性相关联的二维指纹图谱,研究黄芩抗氧化活性物质。方法利用高效液相多检测器联用在线检测体系,对黄芩中化学成分进行检测,共鉴定出抗氧化活性的成分10种;然后采用清除效率为指标对各活性成分的抗氧化活性进行评价。结果黄芩苷、5,7,2′,5′-四羟基-8,6′-二甲氧基黄酮、5,7,2′-三羟基-6-甲氧基黄酮、黄芩素等化合物具有较强的清除自由基的活性;6-C-阿拉伯糖基-8-C-葡萄糖基白杨素、6-C-葡萄糖基-8-C-阿拉伯糖基白杨素、千层纸素苷、白杨素-7-O-葡萄糖醛酸苷、汉黄芩苷、去甲汉黄芩素等化合物清除自由基的活性次之。结论采用HPLC-ABTS-DADQ-TOF/MS对黄芩中的抗氧化活性成分进行快速分析鉴定,为黄芩的抗氧化物质基础研究提供数据支持。
Objective To establish a two-dimensional fingerprint of Scutellaria baicalensis between characteristic chemical composition and anti-oxidant activity, and to study its anti-oxidant constituents on-line. Methods The scavenging activities of S.baicalensis for ABTS+ by HPLC-ABTS-DAD-Q-TOF/MS was studied and its active constituents were screened. A total of ten anti-oxidant components in S. baicalensis were identified. The anti-oxidant activities of different active ingredients were evaluated by anti-oxidant efficiency. Results The data showed that baicalin, 5,7,2′,5′-tetrahydroxy-8,6′-dimethoxy flavone, 5,7,2′-trihydroxy-6-methoxyflavone, and baicalein had stronger anti-oxidant activity, and 6-C-arabinosyl-8-C-glucosylchrysin, 6-C-glucosyl-8-C-arabinosyl-chrysin, oroxyloside, chrysin-7-O-glucuronide, wogonoside, and norwogonin had less anti-oxidant activity. Conclusion HPLC-ABTS-DAD-Q-TOF/MS method can rapidly analyze and identify the anti-oxidant components in S.baicalensis, and these experimental data can provide support for the basic research of the anti-oxidant ingredients of S. baicalensis.
引文
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