食品科学 ›› 2005, Vol. 26 ›› Issue (9): 426-429.

• 分析检测 • 上一篇    下一篇

乳制品中马尿酸的检测及其在发酵过程中动态变化研究

 谢国祥, 吴丽莉, 宋如森, 余静, 张存政   

  1. 南京市卫生监督所,南京奶业集团公司,江苏省农科院食品质量安全与检测研究中心
  • 出版日期:2005-09-15 发布日期:2011-09-20

Determination in Dairy and Development Change during Fermentation of Hippuric Acid

 XIE  Guo-Xiang, WU  Li-Li, SONG  Ru-Sen, YU  Jing, ZHANG  Cun-Zheng   

  1. 1.Nanjing Sanition Supervisor Office; 2.Nanjing Dairy Group Corporation Nanjing;3.Food Safety and Research Service Center, Jiangsu Province Agricultural Academy
  • Online:2005-09-15 Published:2011-09-20

摘要: 本文建立用高效液相色谱法(HPLC)测定乳制品中马尿酸的方法,并对纯酸牛乳中马尿酸、动态变化进行了研究。结果表明,以ODS为固定相,甲醇—水—醋酸体系为流动相,马尿酸平均回收率范围为96.2%~104.4%,变异系数(CV)为1.60%,最低检出量为1.8ng,最低检出浓度为0.09mg/kg。研究表明,纯酸牛乳生产用原料乳中马尿酸,在接种乳酸菌后3h基本转化为苯甲酸;建立了纯酸牛乳生产中天然苯甲酸生成量的预测方法,对控制纯酸牛乳中苯甲酸含量具有推广应用价值。

关键词: 马尿酸, 苯甲酸, 检测, 酸牛乳, 动态变化

Abstract: A HPLC method for determination of hippuric acid in dairy is established, and the development change of hippuric acid in plain yoghurt is studied. Hippuric acid can be well separated by RP-HPIC on ODS column and with methanol-water- acetic as mobile phase and UV detector at 254nm. The average recovery ranges from 96.2% to 104.4%; CV is 1.60%; the detection limit is 1.8ng and the detected concentration limit is 0.09mg/Kg. The reserch shows that hippuric acid in the raw milk of plain yoghurt can be converted to benzoic acid 3 hours after the inoculation of Lactic acid bacteria . The method for forecasting the content of benzoic acid during fermentation is of greater use value in controlling the content of benzoic acid in plain yoghurt.

Key words: benzoic acid, hippuric acid, determination method, yoghurt, development change