caa a22 4500 445880295 CHVBK 20180317145540.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s00604-011-0653-9 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0653-9 Modified ionic liquid cold-induced aggregation dispersive liquid-liquid microextraction followed by atomic absorption spectrometry for trace determination of zinc in water and food samples [Elektronische Daten] [Mohsen Zeeb, Mahdi Sadeghi] We report on a new method for the microextraction and determination of zinc (II). The ion is accumulated via ionic-liquid cold-induced aggregation dispersive liquid-liquid microextraction (IL-CIA-DLLME) followed by flame atomic absorption spectrometry (FAAS). The ionic liquid (IL) 1-hexyl-3-methylimidazolium hexafluorophosphate is dispersed into a heated sample solution containing sodium hexafluorophosphate as a common ion source. The solution is then placed in an ice-water bath upon which a cloudy solution forms due to the decrease of the solubility of the IL. Zinc is complexed with 8-hydroxyquinoline and extracted into the IL. The enriched phase is dissolved in a diluting agent and introduced to the FAAS. The method is not influenced by variations in the ionic strength of the sample solution. Factors affecting the performance were evaluated and optimized. At optimum conditions, the limit of detection is 0.18μgL−1, and the relative standard deviation is 3.0% (at n = 5). The method was validated by recovery experiments and by analyzing a certified reference material and successfully applied to the determination of Zn (II) in water and food samples. Figure Springer-Verlag, 2011 Modified ionic liquid cold-induced aggregation dispersive liquid-liquid microextraction nationallicence Zinc nationallicence Flame atomic absorption spectrometry nationallicence Water nationallicence Food nationallicence Zeeb Mohsen Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box 31485/498, Karaj, Iran aut Sadeghi Mahdi Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box 31485/498, Karaj, Iran aut Microchimica Acta Springer Vienna 175/1-2(2011-10-01), 159-165 0026-3672 175:1-2<159 2011 175 604 https://doi.org/10.1007/s00604-011-0653-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0653-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zeeb Mohsen Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box 31485/498, Karaj, Iran aut NATIONALLICENCE 700 1- Sadeghi Mahdi Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box 31485/498, Karaj, Iran aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 175/1-2(2011-10-01), 159-165 0026-3672 175:1-2<159 2011 175 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer