Separation and preconcentration of ultra trace amounts of beryllium in water samples using mixed micelle-mediated extraction and determination by inductively coupled plasma-atomic emission spectrometry

Analytica Chimica Acta
Assadollah Beiraghi, Saeed Babaee

Abstract

In the present study a cloud point extraction process using mixed micelle of the cationic surfactant cetyl-pyridinium chloride (CPC) and non-ionic surfactant Triton X-114 for extraction of beryllium from aqueous solutions is developed. The extraction of analyte from aqueous samples was performed in the presence of 1,8-dihydroxyanthrone as chelating agent in buffer media of pH 9.5. After phase separation, the surfactant-rich phase was diluted with 0.4mL of a 60:40 methanol-water mixture containing 0.03 mL HNO(3). Then, the enriched analyte in the surfactant-rich phase was determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The different variables affecting the complexation and extraction conditions were optimized. Under the optimum conditions (i.e. 1.6 x 10(-4) molL(-1) 1,8-dihydroxyanthrone, 1.2 x 10(-4) molL(-1) CPC, 0.15% (v/v) Triton X-114, 50 degrees C equilibrium temperature) the calibration graph was linear in the range of 0.006-80 ngmL(-1) with detection limit of 0.001 ngmL(-1) and the precision (R.S.D.%) for five replicate determinations at 18 ngmL(-1) of Be(II) was better than 2.9%. In this manner the preconcentration and enrichment factors were 16.7 and 24.8, respectively. Under the presen...Continue Reading

References

Aug 12, 2003·Journal of Colloid and Interface Science·Jing-Liang Li, Bing-Hung Chen
Sep 8, 2004·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·A SafaviR Kamali

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Citations

Feb 25, 2009·Analytical and Bioanalytical Chemistry·C Bosch Ojeda, F Sánchez Rojas
Feb 22, 2011·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Ersin KılınçMehmet Yaman

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