红曲色素稳定性研究

本文采用固态发酵方法,制备红曲米。以红曲发酵大米为原料,探索红曲色素的浸取工艺,确定了最佳溶剂、浸取温度,在此基础上确定了红曲色素的最佳工艺条件。并详细研究了红曲色素的热、光、酸碱、药剂稳定性,结果表明:红曲色素在150℃以下相对稳定;红曲色素紫外稳定,而对太阳光敏感;另外红曲色素对各种不同药剂的稳定性不同,少量NaCl、CaCl2几乎无影响,但Cu2+、Zn2+等离子对其稳定性有影响;红曲色素对pH是稳定的,红曲色素的抽提液到pH11时还保持稳定的红色。

Study on the Stability of Monascus Pigment

Pigment-contained rice was produced after the solid fermentation by Monascus anka. Extraction process of Monascuspigment from the fermented rice was studied and the optimum conditions for the process were determined. The stability conditions ofthe Monascus Pigment such as the heat resistance, Sunlight tolerance, resistance to acid, alkali and reagent, were thoroughly investigatedafter it was extracted.The research results indicated that radio the Monascus pigment could kept relatively stable under 150℃, maintainedstable in the ultraviolet radiation, but very sensitive to the sunlight; while different reagents could differently affect the Monascuspigment. The results showed that small amount of NaCl and CaCl2 had almost no influence, but some ions such as Cu2+ and Zn2+ hadobvious effect on it. Monascus pigment was stable for pH values, as the extracted liqud could hold steadily red even at the pH11 value.