caa a22 4500 463219899 CHVBK 20180405153208.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1134/S1061934807040041 doi (NATIONALLICENCE)springer-10.1134/S1061934807040041 Reactions of the synthesis of azo dyes in solidified gelatin gel and their analytical application in the determination of nitrites [Elektronische Daten] [S. Sheremet'ev, V. Kuznetsov] The interaction of aromatic sulfonates of azo and diazo components in diazotization and azocoupling reactions electrostatically immobilized on gelatin solidified gel was studied. It was found that, among the variety of the functional groups of the polymer (amino, hydroxy, and carboxy groups and guanidine, phenol, and sulfur-containing amino acid residues), some groups are capable of protonation and are responsible for the efficient electrostatic immobilization of aromatic sulfonates with amino and hydroxy groups. A sufficiently high capacity of the polymer gel causes the formation of a relatively large amount of immobilized compounds, which makes it possible to conduct different types of synthetic analytical reactions of the formation of azo dyes in these gelatin gels in the real-time mode. It was demonstrated that, in all cases, the rate-determining step is external diffusion. These effects were used for the preparation of irreversible sensing elements suitable for measurements of calibration functions using the fixed-time technique or the tangent method in the determination of nitrites in solutions. Pleiades Publishing, Ltd., 2007 Sheremet'ev S. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut Kuznetsov V. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/4(2007-04-01), 319-324 1061-9348 62:4<319 2007 62 10809 https://doi.org/10.1134/S1061934807040041 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807040041 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sheremet'ev S. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut NATIONALLICENCE 700 1- Kuznetsov V. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/4(2007-04-01), 319-324 1061-9348 62:4<319 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer