(13th international symposium on advances in extraction technologies (EXTECH 2011 , 2011-09-26

Title : ( Determination of Iron in Water Samples by Directly Suspended droplet Microextraction Combined with UV–Vis Spectrophotometry )

Authors: Narjes Ashraf ,

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Abstract

Iron (Fe) is widely distributed in the nature and is one of the most important elements in environmental and biological systems [1]. Dissolved Fe in the natural water is found as both Fe(II) and Fe(III) forms with transformations between these states, which is of great interest in both atmospheric chemistry and oceanography [2] and it is very important to develop sensitive methods for quantitative determination of trace Fe in various matrices [3]. A novel, simple and efficient method for the iron (Fe) determination in different water samples have been developed using directly suspended droplet liquid phase microextraction technique followed by spectrophotometric measurement. The procedure is based on complex formation of Fe(II) with O-phenanthroline, the subsequent ion-association formation with picrate anion, and then extraction of the ternary complex into a suspended organic phase droplet. The iron present in the organic phase was then transferred to a microvolume (100 µL) spectrophotometric quartz cell with 1 cm pathlength and the absorbance is measured at the wavelength of 510 nm. The influence of several factors relevant to microextraction and complex formation steps such as the type of the organic solvent, the volume of the extractant phase, the concentration of chelating (O-phenantroline) and ion associating (picrate anion) agents, the pH of the solution (donor phase), the salt addition effect, the extraction time and stirring speed have been investigated and optimized. The analytical performance of the method has been evaluated under optimum operating conditions which showed good linearity, low detection limit, high enrichment factor and high sensitivity for the proposed method. The interference of various ions was examined and the serious interferences were not observed in the proposed method. The proposed method was the applied for the extraction and determination of Fe(II) ions in natural water sampled. A satisfactory agreement exists between the results obtained by the proposed method and those reported by certified analytical method. The proposed method was simple, rapid, cost efficient and sensitive, especially for the detection of iron.

Keywords

, Directly suspended droplet microextraction, O-phenanthroline, UV-Vis Spectrophotometry, Water sample.
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@inproceedings{paperid:1024125,
author = {Ashraf, Narjes},
title = {Determination of Iron in Water Samples by Directly Suspended droplet Microextraction Combined with UV–Vis Spectrophotometry},
booktitle = {(13th international symposium on advances in extraction technologies (EXTECH 2011},
year = {2011},
location = {کوالالامپور},
keywords = {Directly suspended droplet microextraction; O-phenanthroline; UV-Vis Spectrophotometry; Water sample.},
}

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%0 Conference Proceedings
%T Determination of Iron in Water Samples by Directly Suspended droplet Microextraction Combined with UV–Vis Spectrophotometry
%A Ashraf, Narjes
%J (13th international symposium on advances in extraction technologies (EXTECH 2011
%D 2011

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