Objective:

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On the basis of traditional experience identification

and appearance characteristics and intrinsic index components of Glycyrrhizae Radix et Rhizoma pieces

a comprehensive evaluation was carried out to explore the method of grading Glycyrrhizae Radix et Rhizoma pieces and establish grading standards.

Method:

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Based on the investigation of 44 batches of Glycyrrhizae Radix et Rhizoma pieces

including their properties

glycyrrhizin content and ammonium glycyrrhizinate content

Glycyrrhizae Radix et Rhizoma pieces were classified according to the market grading to establish the grading standards.

Result:

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Based on the above data

the Glycyrrhizae Radix et Rhizoma pieces were classified into four grades. First-class: average diameter>1.66 mm

average weight>0.54 g

glycyrrhizin content>1.10%

glycyrrhizic acid content>2.12%. Second-class: the average diameter is between 1.40-1.66 mm

the average weight is between 0.42-0.54 g

the content of glycyrrhizin is between 0.74%-1.10%

and the content of glycyrrhizic acid is between 1.95%-2.12%. Third-class: the average diameter is between 1.07-1.40 mm

the average weight is between 0.29-0.42 g

the content of glycyrrhizin is between 0.65%-0.74%

and the content of glycyrrhizic acid is between 1.88%-1.95%. Substandard: the average diameter<1.07 mm

average weight<0.29 g

content of glycyrrhizin<0.65%

content of glycyrrhizic acid<1.88%.

Conclusion:

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This experiment combines the traditional experience and modern analysis method

in order to develop a scientific

reasonable and accurate classification method.