摘要
在pH4．8的邻苯二甲酸氢钾-氢氧化钠缓冲溶液中，Fe^3＋与α-乙酰-γ-丁内酯形成稳定的络合物，最大吸收波长为480nm，络合物的表观摩尔吸光系数（ε）为3．6×10^3L/（mol·cm），Fe^3＋的质量浓度在0-40μg／（10mL）范围内符合比耳定律。该方法测定铝合金和多维元素片（21）中微量的铁，回收率为99．3％-114．3％，相对标准偏差为1．87％（n=8）。
The reagent α-acetyl-γ-butyrolactone（ABL） react with iron（Ⅲ） to form a stable complex in the buffer solution of COOHC6 H4 COOK-NaOH with pH 4.8. The maximum absorption wavelength was at 480 nm. The apparent molar absorptivity was 3.6×10^3L/（mol·cm）^-1. Beer＇s law was obeyed in the range of 0-40μg/（10 mL） for iron（Ⅲ）. The method has been applied satis-factorily to the determination of iron in aluminum alloys and vitamins with minerals tablets （ 21 ）, the recoveries were 99.3% - 114.3%, the relative standard deviations were 1.87% （n =8）.
出处
《化学分析计量》
CAS
2008年第3期24-26,共3页
Chemical Analysis And Meterage
基金
山西省科委攻关项目(2006031204)
