为了研究红枣不同组分的营养成分分布情况，以山东大枣（骏枣）、和田玉枣（骏枣）和若羌灰枣（灰枣）为试验样品，采用比色法、高效液相色谱（HPLC）法等，对枣果不同部位（枣肉、枣皮和枣核）中的多糖、总黄酮、总酚、三萜和环磷酸腺苷（cAMP）含量进行分析测定。结果表明枣皮中的总酚和总黄酮含量分别为0.77~1.20%和0.29~0.43%，显著高于枣肉和枣核（p<0.01）；三萜类物质主要分布在枣皮和枣肉中，约0.36~0.40 mg/g，枣核中含量最少；多糖在枣肉中含量最高（4.72~6.13%），枣核中含量最低（0.67~1.30 %）；cAMP在枣皮及枣肉中含量最高，在不同品种间分布差异显著，其中和田玉枣的皮和肉中cAMP 含量（0.27 mg/g、0.34 mg/g）显著高于其他两个品种（p<0.05）；常规非可食用部位（枣皮和枣核）占枣果总质量的20~30%。因此红枣的非可食部分的营养成分含量较高，有较好的开发前景和深加工利用价值。

Phytochemicals, such as polysaccharide, flavonoid, total phenol, triterpene and cyclic adenosine monophosphate (cAMP), were studied in different parts (pulps, peels and seeds) of three Chinese jujube cultivars: Shandongdazao, Hetianyuzao and Ruoqianghuizao. The results showed that the inedible parts (peels and seeds) contained 20~30% total weight of Chinese jujube. The peel of all cultivars had the highest total flavonoids (0.29~0.43%) and total phenol (0.77~1.20%). Peels and pulps also contained the highest triterpene in jujube cultivars (0.36~0.40 mg/g), significantly higher than that in seeds. The pulp had the highest polysaccharide of 4.72~6.13%. cAMP was mainly distributed in pulps and peels, ranging from 7.22 to 33.56 mg/g, and it had significant difference between different varieties. In addition, cAMP content in the peels and pulps of Hetianyuzao (0.27-0.34 mg/g) was much higher than those in the other two cultivars. Therefore, phytochemicals in the inedible parts of Chinese jujube are proved to have applicable values and potential on deep processing.

中央高校基本科研业务费专项资金（2012X22X003-6）