相对质量常数用于甘草饮片等级评价研究

Application of relative quality constant in grades evaluation of Glycyrrizae Radix et Rhizome pieces

质量常数评价方法是一种综合性饮片等级评价方法,但是在用于甘草饮片等级评价时,因指标成分甘草苷和甘草酸的含量差异较大,权重不合理,导致等级评价出现偏离。为解决这一问题,该文建立了相对质量常数用于甘草饮片的等级评价。该研究共收集了29批不同质量的甘草饮片,最终以检验合格的17批甘草饮片为研究对象,研究结果显示其相对质量常数范围1.78~11.49。如果把甘草饮片划分成3等级,则:一级甘草饮片相对质量常数≥9.19,二级甘草饮片相对质量常数<9.19且≥5.75,三级甘草饮片相对质量常数<5.75。该研究表明,相对质量常数能够科学、合理、客观、准确的划分饮片的等级,解决了质量常数评价方法存在的问题,为多指标成分的中药饮片等级划分提供了新的模式。

Quality constant evaluation is a comprehensive method for grades evaluation of traditional Chinese medicine pieces, but when it comes to Glycyrrizae Radix et Rhizome pieces, grades evaluation is diverged due to significant difference in contents of liquiritin and glycyrrhizic acid and unreasonable weight of index. To solve this problem, we have established a relative quality constant method in this paper to evaluate grades of Glycyrrizae Radix et Rhizome pieces. Twenty-nine batches of different quality samples were collected and tested, and finally, 17 batches of them were chosen as researcher objects. The results revealed that the range of the relative quality constant of these samples was fi＇om 1.78 to 11.49. When Glycyrrizae Radix et Rhizome pieces are divided into three grades ： the rela- tive quality constant of first grade is greater than or equal to 9. 19 ; the second grade is greater than or equal to 5.75 but less than 9. 19 ; while the third grade is less than 5.75. This research indicates that relative quality constant can divide the grades of herbal pieces in a scientific, reasonable, objective and specific way and remedy the shortage of quality constant perfectly. It provides a novel mode for grading pieces of Chinese medicine that contains multi-target ingredients.