摘要
通过紫外可见分光光度法就温度、pH对红曲米中红曲色素溶解性及稳定性的影响进行了系统研究。通过对不同浸提温度、pH条件下红曲色素水溶液吸光度的测定可知：随着温度升高、pH增大，红曲米中红曲色素在水中的溶解性明显增大，100℃0．5h后AⅧ达最大值0．98，pHl11h后A510基本稳定1．59。通过对不同温度、pH条件下红曲色素水溶液稳定性的研究表明：30-60℃时，红曲色素较稳定，70--100℃时，随着温度的升高对红曲色素的破坏作用增大；pH5-9时红曲色素水溶液较稳定，而强酸强碱对红曲色素均有较强的破坏作用。
Effects of temperature and pH on water-solubility and stability of Monascus pigments were studied. By regulating the temperature and pH to different levels, the absorbance of Monascus pigments was measured by UV-visible spectrophotometer. The results showed that the dissolution of Monascus pigments was enhanced under high temperature and alkali. The maximum absorbancy was 0.980 afer 0.5 h on the condition of 100℃, and reached 1.59 after 1.0 h at pill1. The stability of Monascus pigments at different temperature and pH indicated that Monascus pigments was stable under 30-60 ℃, while it could be destroyed severely under temperature of 70-100 ℃. Monascus pigments was stable at pH5-9, while it could be destroyed severely under strong alkali and acid.
出处
《食品科技》
CAS
北大核心
2013年第11期242-245,250,共5页
Food Science and Technology
基金
国家自然科学基金项目(20576100
20776115
31171729)
关键词
红曲色素
溶解性
温度
酸碱度
稳定性
Monascus pigments
water-solubility
temperation
acid and alkali
stability
