食品科学 ›› 2006, Vol. 27 ›› Issue (4): 182-185.

• 分析检测 • 上一篇    下一篇

京尼平苷为底物测定β-葡萄糖苷酶活力的方法

 梁华正, 刘富梁, 彭玲西, 吴志梅   

  1. 东华理工学院生物系
  • 出版日期:2006-04-15 发布日期:2011-09-13

Method for Determination of β- glucosidase Activity for Geniposide

 LIANG  Hua-Zheng, LIU  Fu-Liang, PENG  Ling-Xi, WU  Zhi-Mei   

  1. Biology Department, East China Institute of Technology, Fuzhou 344000, China
  • Online:2006-04-15 Published:2011-09-13

摘要: 研究以京尼平苷为底物氨基酸为显色剂测定β-葡萄糖苷酶活力的方法。β-葡萄糖苷酶水解京尼平苷的温度为50℃,pH为5.0,京尼平苷浓度为0.625mmol/L,水解10min后,立即加入1ml1mol/LNa2CO3终止反应,混匀,再加入体积比为1:1的0.2mg/ml的精氨酸溶液,沸水浴显色10min,冷却后于590nm处测光吸收度值。该方法的检测线性范围为0.05~1U/ml,相关系数为0.9998,检测限为0.02U/ml,精密度为1.5%(n=5),回收率为99.5%~101.1%,该方法准确度高,结果稳定。

关键词:  , &beta, -葡萄糖苷酶, 京尼平苷, 精氨酸, 活力测定

Abstract: A method for determination of β- glucosidase activity using geniposide as substrate by amino acid colorimetry was reported. The hydrolysis conditions of geniposide with β- glucosidase and the color reaction conditions, were optimized as: hydrolyzing temperature 50℃, time 10min, pH5.0, color reaction temperature 100℃, color reaction time 10min with the volume ratio of geniposide solvent to Arg solvent 1:1.The method measurement range is 0.05~1U/ml, the linear correlationship 0.9998, the detection limit 0.02U/ml and RSD 1.5%(n=5) with the recovery rate is 99.5% to 101.1%.This method has the advantages of wide measuring range, and the determination of β- glucosidase activity.

Key words: beta glucosidase, geniposide, arginine, determination of enzyme activity