Extraction of pigment in super back gutinous corncob
In order to ascertain the optimal conditions of extracting pigment from super black glutinous corncob,solvent,alcohol concentration,extraction temperature,extraction time,and liquid to material ratio were studied.Then the optimal conditions were determined by an orthogonal experiment based on single factor test.Results:The obtained optimum extraction conditions are the mixture of 95% ethanol with 0.1 mol/L HCl,temperature 50 ℃,extraction time 60 min,liquid to material ratio 20:1(v:m),extraction rate of the pigment 93.18% and exaction yield of the pigment 15.62%.