高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (9): 1453.

• 研究简报 • 上一篇    下一篇

毛细管电泳-间接紫外检测法分离和测定食品中的有机酸

傅小芸, 吕建德, 陈耀祖   

  1. 浙江大学应用化学研究所, 杭州 310027
  • 收稿日期:1996-08-12 出版日期:1997-09-24 发布日期:1997-09-24
  • 通讯作者: 傅小芸, 女, 36岁, 硕士, 副教授.
  • 作者简介:傅小芸, 女, 36岁, 硕士, 副教授.
  • 基金资助:

    浙江省自然科学基金;分析测试基金

Separation and Determination of Organic Acids in Foods by Capillary Electrophoresis with indirect UV Detection

FU Xiao-Yun, LU Jian-De, CHEN Yao-Zu   

  1. APPlied Chemical institute, Zhejiang University, Hangzhou 310027
  • Received:1996-08-12 Online:1997-09-24 Published:1997-09-24

关键词: 毛细管电泳, 间接紫外检测, 有机酸, 食品分析

Abstract: Capillary electrophoresis(CE) with indirect UVdetection method for theseparation and determination of several organic acids commonly found in foods were developed.Effects of PH, background electrolytes and electroosmotic flow modifiers on separation wereinvestigated. The carrier electrolyte PHplayed an important role in the separation of organicacids. All analytes could be separated in one run by performing CEwith 5. 0 mmol/Lphthalate-3.0 mmol/Ldodecyl trimethyl ammonium chloride (DTAC) at pH=7. 0 within 6 min.The reproducibllity(RSD) of the method is less than 0.17% for migration time and 4. 2% forthe peak area (n=8). Linearity was observed more than one order between 1 and 80 mg/L.The detection limits are obtained from 0. 5 to 5. 0 mg/L. Avariety of matrix samples such aswine, juices and soy sauce were determined by the method. The recoveries were in the rangeof 95 %-102 %.

Key words: Capillary electrophoresis, Indirect UV detection, Organic acid, Food analysis

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