Op timizing Technics of Extracting Natural Pigment From Purple Cabbage with Microwave-assisted Extraction

The technology of microwave-assisted extracting pigments from purple cabbage using organic solvent was studied.Based on traditional methods,an improved technology was developed through condition optimization with single factorand orthogonal experiments.The obtained optimum extraction conditions are as follows:microwave power 450W,extraction time 3min,and liquid-solid ratio 1:10(mL:g).Compared with traditional extractionmethods and the ultrasound-assisted extraction,the microwave-assisted extraction reduces extraction time from 4h and 50min to 3min So the microwave extraction technique possesses advantages of short time,low energy consumption,and high extraction rate.