Microwave extraction technology has significant advantages over other existing extraction techniques. The chemical solvent extraction method consumes a large amount of energy, consumes a large amount of materials, takes a long time, has low extraction efficiency, and has large industrial pollution. Supercritical fluid extraction is greatly improved in extraction efficiency, but the method requires complicated equipment, narrow solvent selection range, high pressure vessel and high pressure pump, so the investment cost is high, and it is difficult to establish a large-scale extraction production line. Foreign researchers have studied the applicability of microwave-assisted extraction of various pesticides from plant samples. Under the optimized conditions of 10 min microwave irradiation and 50% maximum power, the recovery rate of microwave extraction and traditional supercritical extraction (sfe) insecticides is not much different, but the solvent and time are obviously saved, and multiple samples can be processed simultaneously. At the same time, the research shows that the optimal recovery rate of microwave extraction is closely related to the extraction temperature, the matrix of the plant sample and the type of pesticide. For different samples and different insecticides, the corresponding extraction temperature and time are used to obtain the ratio of supercritical. High recovery of extraction is completely feasible. Comparison of recovery rate and time between traditional methods and microwave-assisted extraction Compound recovery rate/% Time required Traditional microwave traditional microwave natural fat (food) 100 98 >3h <5min antinutritives 40 100 ≥3h <5min Insecticide (soil) 90 100 <1.5h <1min
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