石榴果实酚类物质测定体系优化与不同部位组分及含量测定

2012-04-29 12:31:35韩玲玲苑兆和冯立娟杨尚尚朱峰
山东农业科学 2012年11期
关键词:高效液相色谱

韩玲玲 苑兆和 冯立娟 杨尚尚 朱峰

摘 要:以“泰山红”石榴为试材,利用高效液相色谱仪(HPLC)测定成熟期石榴果实中果皮、籽粒和果汁中酚类物质的组分及含量。色谱条件:色谱柱为Kromasil 色谱柱(250 mm×46 mm, 5 μm),以乙腈-1%乙酸水溶液为流动相进行梯度洗脱。流速为11 ml/min,柱温30℃,检测波长280 nm。结果表明:在石榴皮和石榴籽中检测到13种酚类成分,包括没食子酸、绿原酸、对羟基苯甲酸、表儿茶素、咖啡酸、儿茶素、香草醛、阿魏酸、苯甲酸、根皮苷、槲皮素、肉桂酸、根皮素;在石榴汁中检测到上述12种酚类物质,未检测到表儿茶素。石榴皮中酚类物质的含量最高,其次是石榴汁和石榴籽,其中石榴皮中主要的酸性酚类物质和类黄酮类化合物分别为对羟基苯甲酸(0828 mg/g)和表儿茶素(0915 mg/g);石榴汁中分别是对羟基苯甲酸(0121 mg/g)和儿茶素(0149 mg/g);石榴籽中分别是咖啡酸(0026 mg/g)和根皮苷(0075 mg/g)。

关键词:石榴;多酚;高效液相色谱

中图分类号:S665.4 文献标识号:A 文章编号:1001-4942(2012)11-0112-05

Optimization of Detection System for Polyphenol and Its Compositions

and Contents in Different Parts of Pomegranate Fruit

Han LingLing1,2,Yuan ZhaoHe2*,Feng LiJuan2,Yang ShangShang1,2,Zhu Feng1,2

(1. College of Forestry, Shandong Agricultural University, Taian 271018, China;

2. Shandong Institute of Pomology, Taian 271000, China)

Abstract A high performance liquid chromatographic method was developed for the analysis of polyphenol compositions and contents in different parts of ‘Taishanhong pomegranate fruit including peel, seed and juice. The chromatographic separation was performed on a Kromasil (250 mm×4.6 mm, 5μm). The mobile phase was acetonitrile and 1% acetate acid solution for gradient elution. The column temperature was 30℃; the flow rate was 1.1 ml/min and the wave length was 280 nm. The results indicated that thirteen phenolic compounds were identified in pomegranate peel and seed, including gallic acid, chlorogenic acid, parahydroxybenzoic acid, epicatechin, caffeic acid, catechin, vanillin, ferulic acid, benzoic acid, phloridzin, quercetin, cinnamic acid and phloretin. Twelve phenolic compounds were identified in pomegranate juice, and epicatechin was not detected. The content of polyphenols was the highest in pomegranate peel, followed by pomegranate juice and pomegranate seed. The major acidic phenolic compound and flavonoid compound in pomegranate peel were parahydroxybenzoic acid (0.828 mg/g) and epicatechin (0.915 mg/g) respectively, while those in pomegranate juice were parahydroxybenzoic acid (0.12 mg/g) and catechin (0.149 mg/g) respectively, and those in pomegranate seed were caffeic acid (0.026 mg/g) and phloridzin (0.075 mg/g) respectively.

Key words Pomegranate; Polyphenol; HPLC

石榴( Punica granatum L ),原产伊朗和阿富汗等中亚地区,在中国至今已有2 000多年栽培历史[1,2]。石榴果实营养价值较高,除含有丰富的糖、有机酸、维生素和矿物质等营养成分外,还含有丰富的酚类物质,石榴多酚是石榴中所含多元酚类物质的总称[3~5]。大量的研究证明:石榴多酚具有多种保健功能,如抗氧化性、抗癌抗突变、抑制心脑血管疾病和抑菌等,其抗氧化活性在苹果、石榴、橄榄、芒果、香蕉、菠萝、葡萄和龙眼这八种水果中最高[6~10]。我国石榴种质资源丰富,石榴多酚作为一种新型的功能食品成分具有很好的开发前景。……

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