食品科学 ›› 2005, Vol. 26 ›› Issue (12): 196-198.

• 营养卫生 • 上一篇    下一篇

毛细管电泳间接紫外检测酱油中的游离氨基酸

 傅崇岗, 杨冬芝, 王立新   

  1. 聊城大学化学化工学院,聊城大学教育传播技术学院
  • 出版日期:2005-12-15 发布日期:2011-10-01

Improved Determination Method of Free Amino Acids in Soy Sauce by Capillary Electrophoresis with Indirect Ultraviolet Detection

 FU  Chong-Gang, YANG  Dong-Zhi, WANG  Li-Xin   

  1. 1.School of Chemistry and Chemical Engineering, Liaocheng University; 2.School of Educational Technology and Mass Medium, Liaocheng University
  • Online:2005-12-15 Published:2011-10-01

摘要: 以三羟甲基氨基甲烷(Tris)(pH=10.50)为缓冲液,苯甲酸为背景吸收添加剂,利用毛细管电泳-间接紫外检测方法分离测定了酱油中的丙氨酸、丝氨酸、缬氨酸、亮氨酸、谷氨酸及天冬氨酸。在优化条件下,上述六种氨基酸于5min内实现了基线分离,各物质吸光度的相对标准偏差(RSD)均小于5%。线性范围为10~1000μmol/L,检测限(S/N=3)分别为2.0、3.5、4.0、5.0、3.5、5.0μmol/L,六种氨基酸的加标回收率均在95.9%~104.2%范围内。

关键词: 毛细管电泳, 间接紫外检测, 氨基酸, 酱油

Abstract: Byc apillarye lectrophoresisw ithi ndirectu ltravioletd etection, sixa minoa cids, namely alanine, serine, valine, leucine, glutamic acid and aspartic acid were detected in Tris (pH=10.50) where benzoic acid was taken as its setting electrolyte. Under the optimum conditions, these six amino acids were well separated within 5 minutes. The relative standard deviation (RSD) of the method was better than 5%. The linear calibration range was 10~1000μmolL and the detection limit were 2.0, 3.5, 4.0, 5.0, 3.5 and 5.0μmol L respectively. Their recoveries were all in the range of 95.73%~104.46%.

Key words: capillary electrophoresis, indirect ultraviolet detection, amino acid, sauce