Bononi Monica, Tateo Fernando
Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Milano, Italy.
Int J Food Sci Nutr. 2007 Mar;58(2):142-9. doi: 10.1080/09637480601154061.
Anthocyanins can be considered spy-substances, useful in obtaining information regarding the shelf-life of food supplements containing cranberry juice or cranberry-derived extracts. The level of total anthocyanins, as evaluated by high-performance liquid chromatography-diode-array detector and analytically expressed as cyanidin aglycone, represents a 'quality index' useful for routine estimation of shelf-life. The objective of this work was to study the stability of anthocyanins in a commercial cranberry (Vaccinium macrocarpon) dried extract compared with the stability of the same extract contained in a food supplement enriched with alpha-tocopheryl succinate and ascorbic acid. The values obtained after exposure of the samples to natural light and to alternating hot and cold temperatures show considerable sensitivity of the commercial cranberry dried extract to the agents used for the same evaluation (time, temperature and light) and emphasize a positive effect of the enrichment of the derived preparation with alpha-tocopheryl succinate and ascorbic acid.
花青素可被视为一种“间谍物质”，有助于获取有关含有蔓越莓汁或蔓越莓提取物的食品补充剂保质期的信息。通过高效液相色谱 - 二极管阵列检测器评估并以矢车菊素苷元形式分析表达的总花青素水平，是用于常规估计保质期的“质量指标”。这项工作的目的是研究市售蔓越莓（大果越桔）干提取物中花青素的稳定性，并与富含琥珀酸生育酚和抗坏血酸的食品补充剂中所含相同提取物的稳定性进行比较。将样品暴露于自然光以及交替的冷热温度后获得的值表明，市售蔓越莓干提取物对用于相同评估的因素（时间、温度和光照）相当敏感，并强调了用琥珀酸生育酚和抗坏血酸对衍生制剂进行富集的积极作用。
