caa a22 4500 445879998 CHVBK 20180317145539.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00604-011-0674-4 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0674-4 Sensitive and selective spectrophotometric determination of palladium(II) ion following its preconcentration using modified magnetite nanoparticles and 3-phasic backextraction [Elektronische Daten] [Habibollah Eskandari, Maryam Khoshandam] We report on a method for selective extraction and backextraction for the ultra-sensitive determination of Pd(II). Magnetite nanoparticles modified with sodium dodecyl sulfate were used to extract Pd(II) as its green 1-(2-pyridylazo)-2-naphtholate complex prior to zero- and first-derivative spectrophotometric determination at 659 and 681nm, respectively. A sample volume of 70mL was backextracted with 0.50mL of n-butanol in a 3-phasic system. The effects of reaction time and the other variables were optimized. The enrichment factor is 134 and the calibration plots are linear in the range from 2 to 90ngmL-1 of Pd(II). The detection limit is 0.3ngmL-1 and the relative standard deviations and recoveries at levels of 10 and 72ngmL-1 of Pd(II) are in the range from 1.1-4.9%, and from 98.5-102.6%, respectively. Most ions do not significantly interfere. The method was successfully applied to the determination of Pd(II) in water and urine samples, alloys, and palladium catalysts. Figure The new SPE method was developed for the preconcentration-spectrophotometric determination of palladium using dodecyl sulfate coated magnetite nanoparticles as adsorbrnt and then backextraction by a low volume of n-butanol in a novel 3-phasic backextraction. The established SPE method proved to be efficient for palladium determination and provided satisfactory recoveries and precisions. Springer-Verlag, 2011 Palladium nationallicence Solid phase extraction nationallicence 1-(2-Pyridylazo)-2-naphthol nationallicence Modified magnetite nanoparticles nationallicence Eskandari Habibollah Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, 56199-11367, Ardabil, Iran aut Khoshandam Maryam Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, 56199-11367, Ardabil, Iran aut Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 291-299 0026-3672 175:3-4<291 2011 175 604 https://doi.org/10.1007/s00604-011-0674-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0674-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Eskandari Habibollah Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, 56199-11367, Ardabil, Iran aut NATIONALLICENCE 700 1- Khoshandam Maryam Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, 56199-11367, Ardabil, Iran aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 291-299 0026-3672 175:3-4<291 2011 175 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer