Abstract: Objective To investigate five kinds of microwave drying equipment for Leonurus Leonurus japonicus Houtt. The impact of quality. Methods The contents of alkaloids (salbutine, motherwort) and flavonoids (rutin, quercetin, apigenin, saponin) were used as evaluation indexes for drying, dryness, hot air drying, infrared drying and microwave drying. The quality of the later motherwort was evaluated and analyzed by the TOPSIS method.
Results After hot air drying, the components remained the best; after microwave drying, the components were most lost. The whole plant can retain more ingredients than the dry section. The higher the drying temperature, the less the components are lost.
Conclusion: The whole plant hot air drying at 70 °C is the most suitable drying method for motherwort.
Conclusion: The whole plant hot air drying at 70 °C is the most suitable drying method for motherwort.
Key words: Motherwort microwave drying; drying method; alkaloid; flavonoid; TOPSIS method
Motherwort is a fresh or dry aerial part of the Labiatae family, which is listed in the “Shen Nong’s Herbal Classic” and is listed as the top grade. It has been recorded in the past dynasties. It is known as the “blood family holy medicine” and the “good medicine”. The effect of promoting blood circulation, diuresis and swelling, clearing away heat and detoxifying.
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