caa a22 4500 463219600 CHVBK 20180405153208.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1134/S1061934807030021 doi (NATIONALLICENCE)springer-10.1134/S1061934807030021 Highly sensitive sorption-luminescence determination of trace europium with preconcentration on silica chemically modified with iminodiacetic acid [Elektronische Daten] [R. Voronina, N. Zorov] Features of a sorption-luminescence method for the determination of trace europium were studied. The method includes the preliminary sorption of europium at pH 7.1 from solutions with silica chemically modified with iminodiacetic acid, the subsequent treatment of the sorbent with 2-thenoyltrifluoroacetone at pH 8.0, and the measurement of the intensity of luminescence of the surface three-component europium complex at 613 nm. The effect of moisture as the quencher of luminescence of the surface europium complex was studied, and techniques for its removal were proposed. Sorption in the static mode provides the detection limit of europium of 7 × 10−5 µg/mL. The calibration plot is linear in the range of two orders of magnitude of europium concentration in solutions. The relative standard deviation in the determination of 1.5 × 10−2 µg/mL europium is 5%. In the dynamic mode of sorption from 1000 mL of an analyzed solution with the use of sorption-desorption, the detection limit of europium of 8 × 10−7 µg/mL was attained. Pleiades Publishing, Ltd., 2007 Voronina R. Department of Chemistry, Moscow State University, 119992, Vorob'evy gory, Moscow, Russia aut Zorov N. Department of Chemistry, Moscow State University, 119992, Vorob'evy gory, Moscow, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/3(2007-03-01), 206-212 1061-9348 62:3<206 2007 62 10809 https://doi.org/10.1134/S1061934807030021 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807030021 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Voronina R. Department of Chemistry, Moscow State University, 119992, Vorob'evy gory, Moscow, Russia aut NATIONALLICENCE 700 1- Zorov N. Department of Chemistry, Moscow State University, 119992, Vorob'evy gory, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/3(2007-03-01), 206-212 1061-9348 62:3<206 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer