离子色谱－原子吸收联用测定水体中的Fe（Ⅲ）和Fe（Ⅱ）

Determination of Iron(Ⅱ)and(Ⅲ)in water by Ion Chromatography Combined with Atomic Absorption Spectrometry.

研究离子色谱（ＩＣ）与石墨炉原子吸收光谱（ＧＦＡＡＳ）联用测定水体中铁形态的方法。用Ｓｈｉｍ－ｐａｃｋ阳离子交换柱分离Ｆｅ（Ⅲ）和Ｆｅ（Ⅱ），用石墨炉原子吸收法检测，Ｆｅ（Ⅱ）和Ｆｅ（Ⅲ）的检出限分别为３．８ｎｇ／ｍｌ和７．７ｎｇ／ｍｌ。本方法已用于检测自来水和河水的铁的价态，取得了令人满意的结果。

A method for determination of Fe(Ⅱ)and Fe(Ⅲ),which combines ion chromatography and atomic absorption spectroscopy,is described. Fe(Ⅱ)and Fe(Ⅲ)were first separated on a Shima Pack column pecked cation-exchange resin,and then determinated by a graphite furnace atomic absorption spectrometry. The detection limits of Fe(Ⅲ) and Fe(Ⅱ) were at the 7. 7 ng. m1--1 and 3. 8 mg.m1--1,respectively. The method has been successfully used in iron species of tap water and river water.