Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop Combined with Flame Atomic Absorption Spectrometry for Preconcentration and Determination of Thallium(III) in Water Samples

Document Type: Research Article


1 Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN

2 Department of Chemistry, Faculty of Samen Hojaj, Technical and Vocational University, Tehran, I.R. IRAN


Dispersive Liquid-Liquid MicroExtraction technique based on Solidification of a Floating Organic drop (DLLME-SFO) combined with flame atomic absorption spectrometry was developed for determination of thallium in water sample. An appropriate mixture of acetone and 1-undecanol was rapidly injected into an aqueous sample containing TlCl4- which forms an ion pair with brilliant green reagent and as a result a cloudy mixture was formed. After centrifugation, the test tube was cooled for 5 min and the solidified 1-undecanol drop formed on the top of the solution was transferred into a suitable vial and it was dissolved in 300µL of acetone and finally introduced into the flame atomic absorption spectrometer. Several factors affecting the extraction process, such as the volume of the extractant and disperser solvents, centrifugation time, concentration of brilliant green, concentration of HCl, ionic strength, volume of diluting solvent and interferences were studied. Under the optimum operating conditions, the calibration graph was linear in the range of 240-6000ng/mL with a limit of detection of 90 ng/mL and preconcentration factor was 17. The Relative Standard Deviation (RSD) for five replicate measurements of thallium was 3.6%. The accuracy of the method was assessed using a certified reference material (unalloyed zinc) and spiked tap water. The results demonstrated high accuracy, recovery and applicability of the presented method.


Main Subjects

[1] Lan C.H., Lin T.S., Acute Toxicity of Trivalent Thallium Compounds to Daphnia Magna. Ecotox, Environ. Safe., 61, p. 432 (2005).

[2] Lukaszewski Z., Zembrzuski W., Piela A., Direct Determination of Ultra Traces of Thallium in Water by Flow-Injection Differential-Pulse Anodic Stripping Voltammetry, Anal. Chim. Acta, 318, p. 159 (1996).

[3] Tremel A., Masson P., Garraud H. et al., Thallium in French Agrosystems-II. Concentration of Thallium in Field-Grown Rape and Some Other Plant Species, Environ. Pollut., 97, p. 161 (1997).

[4] Townsend A., "Encyclopedia of Analytical Science", Academic Press, London, (1995).

[5] Das A.K., Chakraborty R., Cervera M. et al., Determination of Thallium in Biological Samples, Anal. Bioanal. Chem., 385, p. 665 (2006).

[6] Wei M.T., Jiang S.J., Determination of Thallium in Sea-Water by Flow Injection Hydride Generation Isotope Dilution Inductively Coupled Plasma Mass Spectrometry, J. Anal. At. Spectrom., 14, p. 1177 (1999).

[7] Twining B.S., Twiss M.R., Fisher N.S., Oxidation of Thallium by Freshwater Plankton Communities, Environ. Sci. Technol., 137, p. 2720 (2003).

[8] Nukatsuka I., Seitoh H., Ohzeki K., Solid Phase Extraction with Slurry Injection of the Resin Into ETAAS for Trace Determination of Thallium in Natural Water, Microchim. Acta., 148, p. 177 (2004).

[9] Saleh M.A., Ewane E., Jones J. et al., Chemical Evaluation of Commercial Bottled Drinking Water from Egypt, J. Food Compos. Anal., 14, p. 127 (2001).

[10] Dabeka R.W., Conacher H.B.S., Lawrence J.F. et al. Survey of Bottled Drinking Waters Sold in Canada for Chlorate, Bromide, Bromate, Lead, Cadmium and Other Trace Elements, Food Addit. Contam., 19, p. 721 (2002).

[11] Cheam V., Lawson G., Lechner J. et al. Thallium and Cadmium in Recent Snowandfirn Layers in the Canadian Arctic by Atomic Fluorescence and Absorption Spectrometry, Fresen. J. Anal. Chem., 355, p. 332 (1996).

[12] Zendelovska D., Stafilov T., Extraction Separation and Electrothermal Atomic Absorption Spectrometric Determination of Thallium in Some Sulfide Minerals, Anal. Sci., 17, p. 425 (2001).

[13] Nukatsuka I., Horiguchi R., Seitoh H. et al., Determination of Thallium in Potassium Chloride and Electrolyte Replenishers by Electrothermal Atomic Absorption Spectrometry, J. AOAC Int., 87, p. 986 (2004).

[14] Chamsaz M., Arbab-Zavar M.H., Darroudi A. et al., Preconcentration of Thallium(I) by Single Drop Microextraction with Electrothermal Atomic Absorption Spectroscopy Detection Using Dicyclohexano-18-Crown-6 as Extractant System, J. Hazard. Mater., 167, p. 597 (2009).

[15] Arbab-Zavar M.H., Chamsaz M., Yousefi A. et al., Electrochemical Hydride Generation of Thallium, Talanta, 79, p. 302 (2009).

[16] Arbab-Zavar M.H., Chamsaz M., Zohuri G.H. et al. Synthesis and Characterization of Nano-Pore Thallium (III) Ion-Imprinted Polymer as a New Sorbent for Separation and Preconcentration of Thallium, J. Hazard. Mater., 185, p. 38 (2011).

[17] Taher M.A., Flame Atomic Absorption Spectrometric Determination of Trace Amounts of Thallium After Solid-Liquid Extraction and Preconcentration with Use of 1,10-Phenanthroline Onto Benzophenone, Bull. Korean Chem. Soc., 24, p. 1177 (2003).

[18] Mashhadizadeh M.H., Moatafavi A., Allah-Abadi H. et al., Flame Atomic Absorption Spectrometric Determination of Ultra Traces of Thallium(I) Ion After Solid Phase Extraction by Octadecyl Silica Membrane Disk Modified by a New Schiff Base, Bull. Korean Chem. Soc., 25, p. 1309 (2004).

[19] Taher M.A., Mohammadi Mobarakeh S., Saber Mahani F., FAAS Determination of Thallium After Preconcentration Using Nitroso-S and TDBA on Tobenzophenone, Bull. Chem. Soc. Ethiop., 19, p. 17 (2005).

[21] Rezaee M., Assadi Y., MilaniHosseini M.R. et al., Berijani S., Determination of Organic Compounds in Water Using Dispersive Liquid-Liquid Microextraction, J. Chromatogr. A, 1116, p. 1 (2006).

[22] KhaliliZanjani M.R., Yamini Y., Shariati S. et al., A New Liquid-Phase Microextraction Method Based on Solidification of Floating Organic Drop Anal, Chim.Acta., 585, p. 286 (2007).

[23] Mohammadi S.Z., Sheibani A., Abdollahi F. et al., Speciation of Tl(III) and Tl(I) in Hair Samples by Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Droplet Prior to Flame Atomic Absorption Spectrometry Determination, Arabian Journal of Chemistry, http://dx.doi.org/10.1016/j.arabjc.2012.03.008. 24. Escudero LB, Berton P, Martinis EM et al. Dispersive Liquid-Liquid Microextraction and Preconcentration of Thallium Species in Water Samples by Two Ionic Liquids Applied as Ion-Pairing Reagent and Extractant Phase, Talanta, 88, p. 277 (2012).