Optimization of Ultrasound-assisted Extraction of Anthocyan from Purple Maize

The anthocyanin pigment was extracted from purple maize with microwave-assisted to identify optimum technological condition.Microwave power was main factor of extracting anthocyanin pigment.Effected factors of extracting yield were microwave power,microwave time,extraction temperature and ratio of material to liqnid one by one.The best extraction condition was that microwave radiation power 700w,microwave radiation time 6min,extraction temperature 60℃ and ratio of material to solvent 1∶20(g:mL).Compared with traditional extraction methods,the microwave-assisted extraction reduces extraction time from 24h to 21min and increases extraction yield from 12.24% to 16.87%.So the microwave extraction technique possesses advantages of short time,low energy consumption and high extraction rate.