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چکیده
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Dispersive liquid phase microextraction (DLPME) is a mode of LPME [1-3], which based on ternary component solvent system such as cloudy point extraction and homogeneous liquid-liquid extraction [4]. This method uses an extracting solvent dissolved in a dispersive solvent, which is miscible with both extraction solvent and water. In this work a simple method for the determination of iron in environmental water samples was developed by DLPME preconcentration and flame atomic absorption spectrometry (FAAS) detection. In the proposed approach, 8-hydroxy quinoline was used as a chelating agent and chloroform and methanol were selected as extraction and dispersive solvent. After phase separation, the sedimented phase containing enriched analyte was allowed to evaporate at room temperature, then residue dissolved into 0.5 mL 1.5 mol L-1 nitric acid and determined by FAAS. The effect of various experimental parameters on the extraction was investigated. Under the optimum conditions the calibration graph was liner over the range 50-2000 µg L-1 with detection limitof 8 µg L-1. The relative standard deviation to five replicate measurements of 100 µg L-1 was 4.1%.
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