【摘要】 研究胭脂虫红色素在不同环境下的稳定性,结果表明:胭脂虫红色素具有较好的光、热稳定性,室外阳光下7d保存率高于50%;在4℃低温至100℃高温范围内稳定性较好,8h保存率均超过95%。色素的抗氧化性较高;而在一定的还原剂条件下保存率略有降低。常用食品添加剂对胭脂虫红色素有增色及护色作用;Fe3+、Fe2+、Ca2+、Sn2+离子可破坏色素水溶液稳定性;而其他金属离子对稳定性影响不明显。pH值增大至碱性范围会使稳定性降低,而在酸性pH值下保存率较高。更多还原

【Abstract】 The stability of cochineal extract was investigated experimentally under different conditions.Results showed that the extract was stable to sunlight with over 50% preservation rate after 7 d.In the range of 4 ℃ to 100 ℃,it is also stable with over 95 % preservation rate after 8 h.The extract has high antioxidant ability,whose preservation rate declines slightly due to reducer.It is improved and preserved on color by common food additives.Except Fe3+,Fe2+,Ca2+ and Sn2+,its stability in water solution is not interrupted by other metal ions.Alkaline pH significantly influences its stability,and the higher the pH value,the lower the stability,but under acid condition it has high preservation rate.更多还原