Research on Grade Classification of Quanshen(Polygonum bistorta)Based on"Quality Evaluation through Morphological Identification"and Comprehensive Evaluation Index
There are only unified specifications for market products,the commodity specification and grade standard of Quan-shen(Polygonum bistorta)were established based on quality evaluation through morphological identification.Firstly,the appear-ance and quantity indexes of 24 batches of Quanshen(Polygonum bistorta)were determined.Meanwhile,the extracts,total phe-nolic acid and gallic acid were detected,and the antioxidant activities were evaluated.Then,the correlation between individual appearance index and internal quality index was analyzed,and the comprehensive score of internal quality index was carried out by information entropy weighting method,and the correlation between the comprehensive score of internal quality index and ap-pearance traits was analyzed.Finally,descriptive statistical analysis,principal component analysis and variance analysis were used to determine the importance of the traits.Internal index comprehensive score and total phenolic acid content were positively correlated with length 1,maximum diameter,single mass,L*,b*.The extracts were positively correlated with the length values 1 and L*.There was a significant positive correlation between antioxidant capacity and length value 1,maximum diameter,single mass,L*and b*.Three important character indexes were screened,namely,the maximum diameter,single mass and the number of 100 grams.The commodity specifications of Quanshen(Polygonum bistorta)were divided into general cargo and selected car-go.The cross section of general cargo was dark and brown with a diameter of 0.8-3.0 cm.The selected section was bright in color and yellow.It was divided into two grades.The largest diameter of first grade Quanshen(Polygonum bistorta)was more than 1.8 cm,the single weight was more than 6.9 g,the number of 100 grams was less than 16,and the comprehensive score was≥64.63.The maximum diameter of second grade Quanshen(Polygonum bistorta)was more than 1.5 cm,the single weight was more than 3.8 g,the number of 100 grams was less than 33,and the comprehensive score was ≥35.74.This study confirmed the scientific nature of the herb records,that is,large size and light brown section is better,and the commodity specification and grade standard of Quanshen(Polygonum bistorta)has been established,which is conducive to the market environment and quality con-trol and can ensure the stability and effectiveness of clinical medicine.
万方数据
