食品科学 ›› 2002, Vol. 23 ›› Issue (10): 96-99.

• 分析检测 • 上一篇    下一篇

高效液相色谱法测定食品中的几种重要金属元素

 胡秋芬, 陈江虹, 尹家元   

  1. 玉溪师范学院化学系,云南大学化学系
  • 出版日期:2002-10-15 发布日期:2011-12-31

Study on Determination of Transitional Metal Ions in Food with High Performance Liquid Chromatography

 HU  Qiu-Fen, CHEN  Jiang-Hong, YIN  Jia-Yuan   

  • Online:2002-10-15 Published:2011-12-31

摘要: 研究了用2-(2-喹啉偶氮)-5-二乙氨基酚(QADEAP)为柱前衍生试剂,甲醇(内含0.2%醋酸)和pH4.0醋酸-醋酸钠缓冲溶液梯度洗脱为流动相,WatersNova-Pak-C18液相色谱柱为固定相,二极管矩阵检测器检测,高效液相色谱法分离测定食品中铁、钴、镍、铜、锌和锰的的方法。根据信噪比(S/N=3)各金属离子的检测限分别为:铁3.2μg/L,钴4.1μg/L,镍2.6μg/L,铜4.4μg/L,锌5.0μg/L,锰8.0μg/L,方法相对标准偏差在1.6%~3.5%之间,标准回收率在93%~107%,方法用于食品样品中痕量铁、钴、镍、铜、锌、锰的测定,结果令人满意。

关键词: 高效液相色谱法, 2-(2-喹啉偶氮)-5-二乙氨基酚(QADEAP), 金属元素

Abstract: A new method for the determination of iron, cobalt, nickel, copper, zinc and manganese in food with high performance liquid chromatography by using 2-(2-quinolinylazo)- 5-diethylaminophenol (QADEAP) as chelating reagent was described. With methanol (contained 0.2% acetic acid) and pH 4.0 HAc-NaAc as buffer solution and gradient elution as mobile phase at a flow-rate of 0.5ml/min. The Iron, cobalt, nickel, copper, zinc and manganese chelates of QADEAP could be separated on a Water Nova-Pak-C18 chromato graphic column (3.9×150mm) and monitored with photodiode array detector. The detection limit (S/N=3) was:iron 3.2(μg/L, cobalt 4.1μg/L, nickel 2.6μg/L, copper 4.4μg/L, zinc 5.0μg/L and manganese 8.0 μg/L. The relative standard deviations were 1.6%~3.5 %. The standard recoveries were 93%~107%. This method could be applied to the determination of iron, cobalt, nickel, copper, zinc and manganese in food with satisfactory results.

Key words: HPLC, 2-(2-quinolinylazo)-5-diethylaminophenol , Transitional metal