Organic solvent-soluble membrane filters for the preconcentration and spectrophotometric determination of iron(II) traces in water with Ferrozine

被引:31
作者
Chen, Y
Ding, CM
Zhou, TZ [1 ]
Qi, DY
机构
[1] Capital Normal Univ, Dept Chem, Beijing 100037, Peoples R China
[2] Acad Sinica, Res Ctr Ecoenvironm, Beijing 100085, Peoples R China
来源
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1999年 / 363卷 / 01期
关键词
D O I
10.1007/s002160051152
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
An organic solvent-soluble membrane filter (MF) is proposed for the simple and rapid reconcentration with subsequent spectrophotometric determination of trace levels of iron (II) in water. Iron (II) is collected on a nitrocellulose membrane filter as ion associate of an anionic complex, which is formed by iron (II) and Ferrozine and a cation-surfactant. The ion-pair compound and the MF can be dissolved in small volumes of 2-ethoxyethanol and the absorbance of the resulting solution is measured at 560 nm against a reagent blank with molar absorptivity of 4.01 x 10(4) L mol(-1) cm(-1). Beer's law is obeyed over the concentration range 0-10 mu L-1 of iron (II) in water and the detection limit is 0.03 mu g L-1 with a 50-fold enrichment factor. The proposed method can satisfactorily be applied to the determination of iron (II) in natural water and sea water.
引用
收藏
页码:119 / 120
页数:2
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