Study on the selection and optimization of clarificants of pomegranate wine

In order to select the appropriate clarificants for pomegranate wine,single factor clarification experiment and orthogonal experiment were conducted using glutin,bentonite,chitosan,pectinase and enzyme compounded preparation as clarifying agent and the light transmitance of pomegranate wine was analyzed in this experiment. Furthermore,physical and chemical indexes of pomergranate wine were analyzed before and after clarification.Results showed that bentonite,chitosan and enzyme compounded preparation made better effection than others,and their optimum adding amount was 1.1,1.0,0.0375 g / L,respectively.Chitosan was the best clarificants in this experiment.The light transmitance could reach 94.6%.Based on the single factor clarification experiment,it designed the orthogonal experiment. It obtained that the pomegranate wine was effectively clarified when the addition of enzyme compounded preparation,betonite and chitosan was 0.0375,1.1 and 0.7g /L,and the light transmitance upped to 98.7%.Through analysis,its total acid,total sugar and chromaticity were declined obviously.Total phenol and color variation on the clarity of pomegranate wine was very significant( p < 0.01),and total sugar and total acid on clarity was significant( p < 0.05).