醇溶法提取黑米色素的工艺研究

摘要

以黑米为原料，利用乙醇为浸提剂，研究了黑米色素的提取工艺，分别考察了料液比、浸提pH、浸提温度和浸提时间各单因素水平对提取效果的影响，并通过正交试验确定了醇溶法提取黑米色素最佳的工艺条件。结果表明，影响黑米色素提取的因素主次顺序为：浸提时间>料液比>浸提温度>浸提pH。最佳提取工艺参数为：用体积分数95%的乙醇浸提，料液比1∶45（g∶mL），浸提pH3.0，浸提温度80℃，浸提时间90 min。%The alcohol extraction of black rice pigment was studied. This study choose alcohol as the extract agent. Using single factor and orthogonal experimental method,the effects of ratio of solid-liquid, extraction pH, extraction temperature and extraction time on extraction efficiency were further detected. The results showed that the extraction rate of black rice pigment was mostly influenced by extraction time , followed by ratio of solid-liquid, extraction temperature and extraction pH. The optimum process parameters were alcohol percent 95 % as the extract agent, ratio of solid-liquid 1 ∶ 45 (g ∶ mL),extraction pH 3.0, extraction temperature 80℃and extraction time 90 min.