食品科学 ›› 2005, Vol. 26 ›› Issue (5): 201-204.

• 分析检测 • 上一篇    下一篇

ICP-AES法对苹果浓缩汁中某些金属离子的测定及相关条件分析

 张峰, 仇农学, 邓红   

  1. 陕西师范大学食品工程系
  • 出版日期:2005-05-15 发布日期:2011-09-19

Detection of the Trace Elements in Apple Juice Concentrate by ICP-AES and Analysis of the Related Conditions

 ZHANG  Feng, CHOU  Nong-Xue, DENG  Hong   

  1. Food Engineering Department,Shaanxi Normal University
  • Online:2005-05-15 Published:2011-09-19

摘要: 本实验研究了ICP-AES电感耦合离子体光谱法同时测定苹果浓缩汁中As、Pb、Cd、Sn、Cu、Fe和Zn这7种元素含量的方法。根据仪器的特点,对分析谱线、射频功率、雾化器压力和样品提升量进行分析,选择最佳参数,最大限度地避免了干扰,合理地扣除了光谱背景。分析检测了国家标准参考物GBW07601,验证了方法的准确度。并以回收率和RSD值来衡量此方法的精密度。实验表明:当RF为1150W、雾化器压力为25PSI、溶液提升量为1.85ml/min时,GBW07601测定结果准确,样品回收率测定均在84.6%~103.8%之间,RSD值均小于6。结果证明:该方法准确、可靠,满足果汁测定要求。

关键词: ICP-AES, 苹果浓缩汁, 微量元素

Abstract: This paper studied the method of assaying trace elements by ICP-AES.According to the characteristics of instrument, such as analysis of spectral line, RFpower, nebulizer pressure and sample uptake rate. The optimum analysis parameters should be determined. The interference was avoided at the up most degree and the up spectrum background was eliminated rationally. In order to detect the accuracy of the method, GBW07601 was evaluated. And the precision of the method was scaled by the retrieval proportion of added sample and the RSD.The results showed when RF power was 1150W,nebulizer pressure 25PSI, and sample uptake rate 1.85ml/min. The retrieval proportion of added sample of the 7elements was from 84.6%~103.8% and the relative standard deviation (RSD%) less 6.The result was satisfactory to assay the apple juice concentrate。

Key words: ICP-AES, apple juice concentrated, trace elements