The invention relates to an extraction and purification method of the component with the Chinese herbal
medicine functionality, and aims at providing a method of obtaining monomeric compound
Vitexin and
Isovitexin through extraction and purification from pigeon pea branches and leaves in a simple, safe, economical and high-efficient manner. The invention has the technical proposal of using the fresh and dried pigeon pea branches and the leaves as raw materials, and adopting the combination of a homogenate extraction technique, an ultrasonic assistance extraction technique, an
ultrasonic oscillation flocculation technique, a negative pressure
cavitation suspension extraction technique, a
macropore absorbing resin collecting technique, an ODS-C18 reversed phase medium pressing silicagel
column chromatography technique, a low temperature recrystallization and a recrystallization technique, and then the
Vitexin and the
Isovitexin with the purity of more than 90 percent are obtained, and the extraction rate is more than 0.17 percent and 0.13 percent respectively. The
raw material used by the invention is the wasted fresh or dried pigeon pea branches and leaves in the agricultural production, thus the invention cannot damage the ecological balance of plants and affect the agricultural production, and can further get the pigeon pea functionality component. Moreover, the method has the steps of extraction, primary decontaminating and purification, and is simple and practical with little objective compound, thus the method is applicable for the industry application, and has important meaning to the industrialized production.