caa a22 4500 463220242 CHVBK 20180405153209.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1134/S1061934807050048 doi (NATIONALLICENCE)springer-10.1134/S1061934807050048 Selective extraction-photometric redox determination of low concentrations of sulfur(IV), selenium(IV), tellurium(IV), and arsenic(III) [Elektronische Daten] [G. Sergeev, E. Shlyapunova, M. Pozdnyakova] A procedure is proposed for the selective extraction-photometric determination of the acid-forming elements S(IV), Se(IV), Te(IV), and As(III) in their mixtures containing molecular forms or anions with different electron densities on donor atoms. The procedure is based on the difference in the oxidizability of analytes with the [SbCl6]− complex. The analytical ranges are found at different pHs of the medium, affecting the potential of the two-phase redox systems. The detection limits for sulfite, selenite, tellurite, and arsenite are 1 × 10−3, 5 × 10−5, 7 × 10−5, and 1 μg/mL, respectively. The procedure is applied to the determination of selenium in H2SO4 of high-purity grade, which is used in the production of microelectronics items and in some agricultural samples. The error of analysis is no worse than 20%. Pleiades Publishing, Ltd., 2007 Sergeev G. Department of Chemistry, Lobachevsky State University, pr. Gagarina 23, 603950, Nizhni Novgorod, Russia aut Shlyapunova E. Department of Chemistry, Lobachevsky State University, pr. Gagarina 23, 603950, Nizhni Novgorod, Russia aut Pozdnyakova M. Department of Chemistry, Lobachevsky State University, pr. Gagarina 23, 603950, Nizhni Novgorod, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/5(2007-05-01), 416-423 1061-9348 62:5<416 2007 62 10809 https://doi.org/10.1134/S1061934807050048 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807050048 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sergeev G. Department of Chemistry, Lobachevsky State University, pr. Gagarina 23, 603950, Nizhni Novgorod, Russia aut NATIONALLICENCE 700 1- Shlyapunova E. Department of Chemistry, Lobachevsky State University, pr. Gagarina 23, 603950, Nizhni Novgorod, Russia aut NATIONALLICENCE 700 1- Pozdnyakova M. Department of Chemistry, Lobachevsky State University, pr. Gagarina 23, 603950, Nizhni Novgorod, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/5(2007-05-01), 416-423 1061-9348 62:5<416 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer