caa a22 4500 463219503 CHVBK 20180405153207.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1134/S1061934807030148 doi (NATIONALLICENCE)springer-10.1134/S1061934807030148 Sensing elements of optical sensors based on polystyrene with covalently immobilized reagents [Elektronische Daten] [V. Kuznetsov, S. Sheremet'ev] A procedure was developed for the preparation of sensing elements for optical sensors based on pressed membranes of optically transparent polystyrene 250 μm in thickness. The procedure for assembling reagents on a matrix surface involved the operating sequence of nitration, reduction, diazotization, and azo coupling with organic reagents from the class of monoazochromotropic acid. This allowed us to prepare sensing elements with reproducible properties. The optical properties of immobilized reagents and their complexes with metal ions are practically analogous to those of compounds formed in solutions. External diffusion is a rate-determining step in the reactions with metal ions. The time constants of various sensing elements at metal concentrations of 4 × 10−7 mol/mL were about 30 s, and the time taken to produce a signal at a 95% level was 50-56 s. Pleiades Publishing, Ltd., 2007 Kuznetsov V. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut Sheremet'ev S. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/3(2007-03-01), 270-278 1061-9348 62:3<270 2007 62 10809 https://doi.org/10.1134/S1061934807030148 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807030148 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kuznetsov V. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut NATIONALLICENCE 700 1- Sheremet'ev S. Mendeleev University of Chemical Technology, Miusskaya pl. 9, 125047, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/3(2007-03-01), 270-278 1061-9348 62:3<270 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer