Study on extraction of purple pigment in corn

The research used a purple corncob as material and confirmed the best extract method of purple pigment by experiment.The result showed that the best absorb wavelength was 510nm. Non-ion water with a pH 2 had the best distill effect,the best ratio of distill fluid and material was 120,the best distill temperature was 60C ,the best distill time was 4 h.Pigment products(crude) was obtained after extract exhaust filtering,rotary evaporators and dry,distill rate of the pigment in purple corncob was calculated:6%.