Study on Yellow Pigment Extraction from Corn Using Microwave-assisted Method

Extraction of the yellow pigment from corn by the microwave-assisted method is studied.The extraction performance of corn's yellow pigment with the varied conditions,such as different solvent,mesh size,extraction temperature,extraction time and so on,has been examined.The results of orthogonal experiments show that,temperature has the greatest influence on corn's yellow pigment extraction,the extraction time takes second place,and the mesh size has little infuence.The best technological conditions are obtained as follow:95% ethanol as the solvent,solid-liquid ratio 10∶1mL/g,mesh size 80,extraction temperature 70℃ and extraction time 11 min.The absorbency is 0.658 under these best extraction conditions.