Ultrasonic-microwave extraction process for total flavonoids in leaves of Ilex cornuta Lindl.ex Paxt.

Abstract

The invention discloses an ultrasonic-microwave extraction process for total flavonoids in leaves of Ilex cornuta Lindl.ex Paxt., and relates to the technical field of an ultrasonic-microwave extraction process, aiming at solving the problem of an existing method on the content of total flavonoids in leaves of Ilex cornuta Lindl.ex Paxt. According to the extraction process, through a single-factor experiment, the influence of seven factors, namely temperature, ethanol concentration, solid-to-liquid ratio, microwave time, extraction number of times, ultrasonic time and grinding particle size, on an extraction rate is investigated, and four factors, namely the temperature, the ethanol concentration, the solid-to-liquid ratio and the microwave time, are determined in an orthogonal experiment; the extraction method is simple and convenient in process, high in product content and is suitable for extraction of total flavonoids in leaves of Ilex cornuta Lindl.ex Paxt.; and a detection method, involving quality standard, is scientific, advanced, rapid and strong in operability.

Description

Technical field [0001] The invention relates to the field of ultrasonic-microwave extraction technology, in particular to the ultrasonic-microwave extraction process of total flavonoids from leaves of citrifolia. Background technique [0002] The leaves are the dried leaves of Ilexcornuta Lindl.exPaxt., a plant of the family Ilexaceae. Harvest in autumn, remove impurities and sun-dried. This product is in the shape of a rectangular or rectangular mesh, and occasionally has a long oval mesh. Length 3 ~ 200px, width 1.5 ~ 100px. The apex has 3 large hard thorn teeth, the top 1 is often recurved, the base is truncated or broadly wedge-shaped, sometimes each side has 1 to 3 thorn teeth, and the edge is slightly revolute; the long oval leaves are often without thorns tooth. The upper surface is yellow-green or green-brown, shiny, and the lower surface is gray-yellow or gray-green. The veins are pinnate and the petioles are short. Leather. Hard and thick. Gas micro, slightl...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many patents and literatures on the extraction and preparation methods of total flavonoids from Lyceum chinensis leaves, including water boiling alcohol precipitation, dilute alcohol percolation method, hot water extraction method, etc. The overall defect of these extraction methods is that there are many impurities in total flavonoids. The extraction rate is low, and the solvent consumption and residue are large; while the method of ultrasonic-microwave extraction of total flavonoids from Lycii flavonoids is simple in process and high in product content, it is suitable for the extraction of total flavonoids from Lycium barbae leaves, and the detection method involved in the quality standard is scientific, advanced and fast , strong maneuverability

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