毛细管电泳电感耦合等离子体原子发射光谱法分析铁的形态

Speciation of Iron Using Capillary Electrophoresis Inductively Coupled Plasma Atomic Emission Spectrometry

用毛细管电泳电感耦合等离子体原子发射光谱法研究了Fe2+-Fe3+在络合剂o-phen中,混合络合试剂o-phen和EDTA中的形态分离,以及游离态Fe2+-Fe3+的分离。考察了电压、缓冲液的pH值和络合剂浓度等对游离态铁形态分离的影响,获得了满意的分离条件。在分析过程中,阳离子、阴离子、以及络合试剂均不产生干扰,该方法优于毛细管电泳紫外-可见光谱法。

The separation of iron species, e.g. Fe^2＋ -Fe^3＋ , Fe^2＋ -Fe（phen）3^2＋ , and Fe^2＋ -Fe^3＋ , by mixing with complexing reagents of o-phenanthroline and EDTA, and Fe^2＋ -Fe^3＋ with o-phenanthroline was developed by capillary electrophoresis inductively coupled plasma atomic emission spectrometry（CE-ICP-AES）. The effects of electrophoresis conditions such as voltage, buffer solution pH, and complex concentration on iron species are discussed. Satisfactory separation conditions for iron speciation have been acquired. Cations and anions, containing complexing agents, do not interfere in the separation of iron species. The method has advantage to CE-UV.