Abstract: The applicability of microwave drying technology in the processing and production of Chinese traditional medicine Huangqi was studied. The characteristics of microwave drying technology were summarized, and the optimal treatment method of Huangqi concentrated extract by microwave vacuum drying was explored. Astragalus tablets were used as test samples. The experiments were carried out by dry contrast experiments and microwave drying. The relative density, drying temperature and vacuum value of the extracts were used as variables.
The results show that: the microwave drying time is the shortest, the extract 52. 2%, baicalin (C21 H18 O11) content 10. 2%; optimal vacuum drying conditions for Astragalus concentrated extract: The relative density of the extract is 1. 35, drying temperature is 70 °C, vacuum value - 0. 07 Mpa. Microwave drying equipment is an effective, practical, promising and promising new drying technology suitable for the Chinese medicine production industry with high requirements for drying.
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