Sn(ІІ)-ion-selective electrodes based on chalcogenide glasses for water media analyzes

Sn(ІІ)-ion-selective electrodes (Sn(II)-ISEs) based on chalcogenide glasses (ChGs) from the GeSe 2–Sb 2Se 3–SnSe system were created. All-solid-state Sn(II)-ISEs of “coated-wire” type were designed, which consist of inner Ag/AgCl reference electrodes uniformly coated with composite mixtures of bindi...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2009-09, Vol.355 (31), p.1566-1570
Main Authors: Vassilev, V., Tomova, K., Boycheva, S., Parvanova, V.
Format: Article
Language:English
Subjects:
Alloys
Analytical chemistry
Chalcogenides
Chemistry
Electrochemical methods
Exact sciences and technology
Glasses
Ion-selective electrodes
Sensors
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Summary:Sn(ІІ)-ion-selective electrodes (Sn(II)-ISEs) based on chalcogenide glasses (ChGs) from the GeSe 2–Sb 2Se 3–SnSe system were created. All-solid-state Sn(II)-ISEs of “coated-wire” type were designed, which consist of inner Ag/AgCl reference electrodes uniformly coated with composite mixtures of binding polymer and GeSe 2–Sb 2Se 3–SnSe glassy powder. Sn(II)-ISEs were tested in aqua solutions of the potential-determining ions with respect to their basic analytical characteristics: stability, linear range (L, mol l −1) and slope (S, mV dec −1) of the electrode function, working pH-range, limits of detection (LD, mol l −1), response time ( τ 95, s) and selectivity coefficients ( K i , j pot ) in the presence of ions, which commonly accompany Sn 2+-ions in the analytical media. Potential-generation mechanism, taking place on the membrane/analyzed solution interface, was suggested to explain the peculiarities in the analytical performance of the Sn(II)-ISEs.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2009.06.007