Speciation of Fe(II) and Fe(III) by using dispersive liquid-liquid microextraction and flame atomic absorption spectrometry

Journal of the Brazilian Chemical Society

University of Kurdistan, Sanandaj, Iran¹  Zakerian, Razieh¹  Bahar, Soleiman¹ 

关键词: dispersive liquid-liquid microextraction;    Fe(II);    Fe(III);    flame atomic absorption spectrometry;    water samples;   

DOI  :  10.1590/S0103-50532012000500021

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

An extraction method for Fe(III) from water sample before spectrometric determination was developed. Dispersive liquid-liquid microextraction (DLLME) technique was successfully used as sample preparation method for flame atomic absorption spectrometry (FAAS). In the proposed approach, 8-hydroxy quinoline (oxine) was used as chelating agent, chloroform and methanol were selected as extraction and dispersive solvents, respectively. Some factors influencing the extraction efficiency of Fe(III) and its subsequent determination were studied and optimized, including: type and volume of extraction and dispersive solvents, pH of sample solution, concentration of the chelating agent and extraction time. Under the optimized conditions, the enrichment factor of this method for Fe(III) was 462. The limit of detection for Fe(III) was 4.5 ng mL-1, and the relative standard deviation (RSD) 1.4% (n = 5, c = 400 ng mL-1).

【 授权许可】

Unknown