食品科学 ›› 2007, Vol. 28 ›› Issue (11): 223-226.

• 工艺技术 • 上一篇    下一篇

沙田柚皮水溶性多糖的提取和测定

 刘国聪, 曾楚杰, 刘力恒, 梁晓线   

  1. 玉林师范学院化生系; 玉林师范学院化生系 广西玉林537000中南大学材料科学与工程学院; 湖南长沙410083; 广西玉林537000;
  • 出版日期:2007-11-15 发布日期:2011-11-22

Extraction and Determination of Water-soluble Polysaccharides from Peels of Grapefruit Planted in Sand-soil

 LIU  Guo-Cong, ZENG  Chu-Jie, LIU  Li-Heng, LIANG  Xiao-Xian   

  1. 1.Department of Chemistry and Biology, Yulin Normal University, Yulin 537000, China; 2.College of Material Science and Engineering, Central South University, Changsha 410083, China
  • Online:2007-11-15 Published:2011-11-22

摘要: 柚皮细颗粒样品经石油醚回流脱脂、热水提取,以葡萄糖为参照品,利用分光光度法测定沙田柚皮中水溶性多糖的含量。葡萄糖浓度在15.0~100.0μg/ml范围内与吸光度有良好的线性关系,回归方程为:A=0.00755X+0.07475(r=0.9992),测出柚皮中水溶性多糖含量是7.28%,精密度为0.82%(n=3);对照实验的回收率为99.00%±1.15%,精密度为0.59%(n=5)。此法操作简便,结果稳定可靠,是柚皮及其果肉中水溶性多糖含量测定的有效方法。

关键词: 柚子, 水溶性多糖, 提取, 测定

Abstract: Water-soluble polysaccharides in grapefruit peels were extracted with hot water and deposited with ethanol after removal of its impurities by refluxing with petroleum ether. Glucose was used as reference in the preparation of calibration curve. The content of water-soluble polysaccharides determined by spectrophotometry was 7.28% with 0.82% RSD(n=3). Good linearity ranged from 15.0μg/ml to 100.0μg/ml. The linear regression equation was as follows: A=0.00755X+0.07475(r=0.9992), Percent recovery of glucose from control experiment was 99.00%±1.15% with 0.59% of RSD(n=5). This method was proved to be simple, reliable and steady with reproducibility and convenient in operation. It can be used for the determination of polysaccharides in pees and pulp of grapefruit.

Key words: grapefruit, water-soluble polysaccharides, extraction, determination