caa a22 4500 445881445 CHVBK 20180317145544.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s00604-011-0611-6 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0611-6 Determination of trace palladium in complicated matrices by displacement dispersive liquid-liquid microextraction and graphite furnace atomic absorption spectrometry [Elektronische Daten] [Pei Liang, Ehong Zhao] We describe a method for displacement dispersive liquid-liquid microextraction (DLLME) along with graphite furnace atomic absorption spectrometry for the determination of Pd(II) in complex environmental samples. In this method, Cu(II) is first complexed with diethyldithiocarbamate (DDTC), and the resultant Cu-DDTC complex added to a sedimented phase and submitted to DLLME. In the second step, the sedimented phase is dispersed into the sample solution containing Pd, and another DLLME procedure is carried out. The Pd ions can displace Cu ions from the pre-extracted Cu-DDTC complex because the stability of the Pd-DDTC complex is higher than that of Cu-DDTC. As a result, Pd is preconcentrated. Potential interferences by transition metal ions of lower complex stability can be largely reduced as they cannot displace Cu from the Cu-DDTC complex. The tolerance limits for such ions are better by 2 to 4 orders of magnitude compared to conventional DLLME. The typical sample volume is 5mL, and an enhancement factor of 96 and a detection limit (3s) of 7.6ngL-1 are achieved. Graphical Abstract A displacement dispersive liquid-liquid microextraction is developed for the preconcentration of Pd(II) from complicated environmental samples. Potential interferences by transitional metal ions of lower complex stability can be largely reduced, and the tolerance limits for such ions were better by 2 to 4 orders of magnitude compared to conventional DLLME. Springer-Verlag, 2011 Displacement dispersive liquid-liquid microextraction nationallicence Palladium nationallicence Graphite furnace atomic absorption spectrometry nationallicence Environmental samples nationallicence Liang Pei Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 430079, Wuhan, People's Republic of China aut Zhao Ehong Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 430079, Wuhan, People's Republic of China aut Microchimica Acta Springer Vienna 174/1-2(2011-07-01), 153-158 0026-3672 174:1-2<153 2011 174 604 https://doi.org/10.1007/s00604-011-0611-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0611-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liang Pei Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 430079, Wuhan, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Ehong Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 430079, Wuhan, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 174/1-2(2011-07-01), 153-158 0026-3672 174:1-2<153 2011 174 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer