利用微過濾膜(0.45μm)與超過濾膜(分子量分割:20,000、50,000、200,000 Dalton) 處理西印度櫻桃汁，以了解膜處理對果汁之澄清效果及成分分佈的影響。結果發現 果汁中葡萄糖、果糖和維生素 C 之排拒率約由 0 至 45%。當體積濃縮比例愈高時，成分之排拒率不變或稍有增加。所得透流液較原汁澄清且呈淡粉紅色。以數學模式估算在不同體積 濃縮比例與不同膜孔隙大小下， 透流液與保留液中葡萄糖、果糖和維生素 C 之濃度，計算 得到之數據與實驗值相當吻合。 he clarification and component distribution of west indian cherry juice treated with microfiltration and ultrafiltration were studied using 0.45 μ m, 20,000, 50,000 and 200,000 Dalton nominal M.W. cut-off membranes. The rejection of glucose, fructose and ascorbic acid was between 0 to 45% and remained constant or increased slightly as the volume concentration ratio (VCR) increased. Results of color measurement indicated that the color of the permeate was light pink and that clarification of the permeate increased. The concentrations of glucose, fructose and ascorbic acid in the permeate and retentate at various VCR with various molecular weight cut-off size membranes were calculated using a mathematical model. The calculated data were in good agreement with the experimental data.
