食品科学 ›› 2005, Vol. 26 ›› Issue (5): 208-210.

• 分析检测 • 上一篇    下一篇

流动注射化学发光增强法测定奶粉中铁

 谢成根, 牛春敏, 容涛, 徐凌   

  1. 皖西学院化学系,安徽大学化学化工学院
  • 出版日期:2005-05-15 发布日期:2011-09-19

Determination of Iron in Milk Powder by Flow Injection with Enhanced Chemiluminescent Detection

 XIE  Cheng-Gen, NIU  Chun-Min, RONG  Tao, XU  Ling   

  1. 1.Department of Chemistry,Anhui West University; 2. Department of Chemistry,Anhui University
  • Online:2005-05-15 Published:2011-09-19

摘要: 在碱性条件下,KIO4氧化鲁米诺产生化学发光,本文系统讨论了Fe(Ⅱ)对鲁米诺-KIO4化学发光体系的影响,发现在一定条件下,Fe(Ⅱ)对鲁米诺-KIO4化学发光体系有较强的增强作用。据此建立了流动注射化学发光增强法测定铁的分析方法。该法测定Fe(Ⅱ)的线性范围为5.0×10-6~5.0×10-9mol/L,检出限为4.4×10-10mol/L。对2.0×10-7mol/L的铁(Ⅱ)进行11次平行测定,得该法的相对标准偏差为2.3%。应用于成功地用于奶粉中铁的测定,结果满意。

关键词: 鲁米诺, 高碘酸钾, 铁(Ⅱ), 化学发光增强法, 奶粉

Abstract: A novel flow injection chemiluminescent enhancement method for the determination of Fe based on luminol-KIO4 system is developed. The method is simple, rapid and effective to determine Fe(Ⅱ)in the range of 5.0×10-6~5.0×10-9mol/L with a detection limit of 4.4×10-10mol/L.The relative standard deviation is 2.3% for the determination of 2.0×10-7mol/L Fe(Ⅱ) (n=11).The method has been applied to determine the content of iron in milk powder with satisfactory results.

Key words: luminol, potassium periodate, iron (Ⅱ), chemiluminescence enhancement effect, milk powder