摘要
【目的】研究红雪茶类胡萝卜素的稳定性,为其高效利用提供参考依据。【方法】以红雪茶提取液中的类胡萝卜素含量为指标,测定不同条件下(光照、温度、酸碱、氧化剂、还原剂和金属离子)类胡萝卜素的保存率。【结果】光照条件对红雪茶类胡萝卜素的稳定性有较大影响,当太阳光直射时降解速度加快;随着温度升高,类胡萝卜素损失加快;酸性环境对类胡萝卜素稳定性具有明显的破坏作用,碱性环境对类胡萝卜素稳定性的影响较小;氧化剂H2O2对类胡萝卜素的稳定性影响轻微,还原剂维生素C和Na2S2O3对类胡萝卜素稳定性有一定的保护作用;Fe2+、Fe3+和Cu2+对类胡萝卜素有明显的破坏作用,其中Cu2+的影响最大。【结论】在提取和保存红雪茶类胡萝卜素时,要注意避光、低温,保持中性条件,避免使用铜制和铁制器皿,同时可加入少许还原剂。
[Objective]Stability of carotenoid in Lethariella spp. was studied to provide references for its efficient applica- tion. [Method]Taking carotenoid content in extraction solution as index, the retention rate of total carotenoid content in extrac- tion solution was determined under different conditions （light, temperature, acid-base, oxidant, reductant and metal ion）. [Result]Carotenoid was sensitive to sunlight and degraded rapidly under direct sunlight. Its loss was accelerated with the in- creasing temperature. Acid environment caused carotenoid loss, but it was relatively stable under alkaline environment. Oxidant H202 had slight impact on carotenoid stability. Reductant Vitamin C and Na2S203 had certain protective effect on the stability of carotenoid. Copper and ferric ions （Cu^2＋, Fe^2＋and Fe3＋）, especially Cu^2＋, obviously destroyed carotenoid. [Conclusion]When using or saving carotenoid, it is necessary to be under the conditions of dark, low temperature, neutral with some reductant and without copper or ferric ware.
出处
《南方农业学报》
CAS
CSCD
北大核心
2013年第5期828-832,共5页
Journal of Southern Agriculture
基金
国家自然科学基金项目(31060031)
云南省教育厅基金项目(2010Y433)
民族药资源化学国家民族事务委员会-教育部共建重点实验室开放基金项目(MZY1301)
云南民族大学青年科学基金项目(09QN05)
云南民族大学大学生创新计划实验项目(2011HX14)
关键词
红雪茶
类胡萝卜素
稳定性
保存率
Lethariella spp.
carotenoid
stability
preservation rate
