[abstract] Objective: To compare the effects of different drying methods on the antioxidant activity of Radix Astragali in vitro, so as to optimize Radix Astragali.
The establishment of drying process provides experimental basis.
Methods: Radix Astragali was dried by sun drying, shade drying, electrothermal blast drying, microwave drying equipment, vacuum freeze drying and vacuum drying respectively. The effects of different drying methods on antioxidant capacity of Radix Astragali in vitro were investigated by DPPH in vitro reaction system.
RESULTS: Different decoctions had scavenging effects on DPPH free radicals, but their scavenging abilities were different. Microwave drying is the strongest, followed by drying, sun drying, vacuum drying, shade drying, vacuum freeze drying, the weakest removal capacity.
CONCLUSION: Microwave drying and electric blast drying are simple, rapid and efficient, and can replace the traditional drying method for drying Radix Astragali.
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