多指标成分结合化学计量学综合评价甘肃产甘草的质量

目的选取甘肃代表性区域(河西、陇中、陇东地区)野生和栽培甘草进行多指标成分测定并结合化学计量学综合分析甘肃产甘草质量,为评价适宜生产区域提供依据。方法建立了多波长检测HPLC测定甘草样品中7种三萜类和黄酮类成分(甘草酸、甘草苷、异甘草苷、芹糖甘草苷、芹糖异甘草苷、甘草素、异甘草素)含量的方法,结合因子和聚类分析综合评价甘肃代表性区域产甘草样品的质量。结果因子分析中,第1公因子与甘草酸、甘草苷、异甘草苷有较强的相关性,第2公因子与甘草素、异甘草素有较强的相关性,2个公因子的方差累积贡献率达到84.28%,能较全面地反映甘草的质量;聚类分析结果将25批不同区域甘草质量分为3类:I类甘草质量最好,主要是野生甘草及产自内蒙古杭锦旗的甘草;II类甘草质量较好,主要产自甘肃河西地区及甘肃陇西;III类甘草质量较差,主要产自甘肃陇中地区(白银)。结论甘肃河西地区及陇西较适宜大力发展甘草产业。通过多指标成分结合化学计量法可用于进一步评价甘草质量,判别适宜甘草生产的产地区划。

Comprehensive evaluation of quality of licorice (Glycyrrhiza uralensis) in different growing regions of Gansu Province based on multi-index components combined with chemometrics methods

Objective In this study, the wild and cultivated licorice of Gansu representative regions (Hexi, Longzhong and Longdong) were measured and analyzed by multi-index components combined with chemometrics methods, which will provide scientific basis for the evaluation of the quality of licorice and the suitable producing areas in Gansu Province. Methods Seven main bioactive components (glycyrrhizin, liquiritin, isoliquiritin, liquiritin apioside, isoliquiritin apioside, liquiritigenin and isoliquiritigenin) in 25 batches of licorice samples were simultaneously determined by HPLC-DAD to comprehensively evaluate the quality of licorice combined with factor analysis and cluster analysis. Results Factor analysis showed that there was a strong correlation between the first common factor and glycyrrhizin, liquiritin and isoliquiritin; and between the second common factor and liquiritigenin, isoliquiritigenin. The variance contribution rate of two common factors was 84.28%, which reflected licorice quality overall. And cluster analysis showed that the quality of 3-year-old licorice (Glycyrrhizae Radix) cultivated in Hangjinqi of Inner Mongolia was the best, followed by that cultivated in Hexi and Longxi of Gansu Province. The quality of licorice in Longzhong of Gansu Province was worse. Conclusion These results showed that it was more suitable to develop licorice planting in Longxi and Hexi area in Gansu Province. The overall evaluation of multi-index components and chemometrics has reference value for quality control of licorice and optimization its suitable planting areas.