Pigment change of freeze-dried carotenoid powder during storage.
Pigment change of freeze-dried carotenoid powder during storage.
复制标题
冻干类胡萝卜素粉末在储存过程中的色素变化。
DOI：
10.1016/s0308-8146(99)00216-2
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发表时间：
2000
期刊：
影响因子：
8.8
通讯作者：
Bing‐Huei Chen
中科院分区：
文献类型：
--
作者：
Y. Tang;Bing‐Huei Chen
研究了冻干类胡萝卜素粉末中色素在 4、25 或 45°C 避光储存或 25°C 光照下的稳定性。以胡萝卜浆废料为原料，采用冷冻干燥法加工类胡萝卜素粉末。通过带有光电二极管阵列检测的 HPLC 分析各种类胡萝卜素。结果表明，α-胡萝卜素、β-胡萝卜素和叶黄素这三种化合物的全反式含量均随着储存温度或光照时间的增加而减少。黑暗储存期间形成的主要异构体是13-顺式-α-胡萝卜素、13-顺式-β-胡萝卜素和13-顺式-叶黄素，而光照期间形成的主要异构体是9-顺式-α-胡萝卜素、9-顺式-β-胡萝卜素和9-顺式-叶黄素。每种色素的全反式加顺式形式的总量的降解速率符合一阶模型，并且发现β-胡萝卜素的速率常数(day−1)最高，其次是α-胡萝卜素和叶黄素。粉末的Hunter L和b值均随着储存时间和温度的增加而降低，而Hunter a值变化不显着（p>0.05）。
The stability of pigment in freeze-dried carotenoid powder during dark storage at 4, 25, or 45°C, or under light at 25°C was studied. Carrot pulp waste was used as raw material for processing carotenoid powder by freeze-drying. The various carotenoids were analyzed by HPLC with photodiode-array detection. Results showed that the amounts of all-trans forms of all three compounds, α-carotene, β-carotene and lutein, decreased with increasing storage temperature or illumination time. The major isomers formed during dark storage were 13-cis-α-carotene, 13-cis-β-carotene and 13-cis-lutein, while 9-cis-α-carotene, 9-cis-β-carotene and 9-cis-lutein were favored during illumination. The degradation rate of the total amount of all-trans plus cis forms of each pigment fits a first order model, and the highest rate constant (day−1) was found for β-carotene, followed by α-carotene and lutein. Both the Hunter L and b values of the powder decreased with increasing storage time and temperature, while the Hunter a value showed insignificant change (p>0.05).