ABSTRACT: OBJECTIVE: To investigate the suitable drying methods of Radix Scutellariae by taking the contents of total polysaccharides, total phenols, total flavonoids, VE with different configurations and antioxidant activity as indicators.
METHODS: The contents of total polysaccharides, total phenols, total flavonoids and antioxidant activities were determined by ultraviolet spectrophotometry, and the contents of VE in different configurations were determined by high performance liquid chromatography. The effects of six different drying methods (shade drying, sun drying, drying, vacuum freeze drying, infrared drying, microwave drying) on the quality of Euphorbia chinensis were evaluated comprehensively.
RESULTS: Microwave drying equipment could preserve the total polysaccharides, phenols and flavonoids to the greatest extent. Under vacuum freeze-drying conditions, the content of VE in different configurations was the highest and scavenged 1,1-diphenyl-2-trinitrophenylhydrazine (1,1-diphenyl-2-picrylhydrazyl, DPPH) free radicals, 2,2’-biazo (3-ethyl-benzothiazole-6-sulfonic acid) diammonium salt was free. (2,2’-azinobis-(3-ethylbenzthiazoline-6-sulphonate), ABTS + had the strongest ability; correlation analysis showed that the content of VE in different configurations was significantly correlated with antioxidant activity.
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