Studies on an araldite‐based membrane of copper hexacyanoferrate (III) as a caesium ion‐sensitive electrode

Abstract

Solid membranes of copper hexacyanoferrate (III) in araldite are evaluated as a caesium ion‐sensitive electrode. The electrode can be used for caesium determination in the concentration range of 10−1 to 10‐4M. The potentials generated across the membrane are reproducible and steady potentials are attained in about 1 to 2min. The same electrode can be used over a period of 6 months without significant change in potential. The electrode can be used in the pH ranges 2.5–6.0 at 10−2 M Cs+ and 3.0–6.0 at 10−3 M CS+, and in presence of a number of interfering ions. Potentiometric titration of caesium nitrate with 12‐moIybdophosphoric acid was also carried out using the membrane as an end point indicator.

New faces of porous Prussian blue: interfacial assembly of integrated hetero-structures for sensing applications

“…The midpeak potential, for both the oxidation and reduction reaction, is a function of potassium cation activity. [201][202][203] Later a number of cationic analytes were enlarged, including NH 4 + , Rb + and other monoand divalent cations. The variations of electrode potentials at a fixed ratio of oxidized and reduced film matrices are entirely due to the changes in the Donnan potential.…”

“…[5][6][7][8] Membrane potentials of PB films show that zeolitic PW, PB, and PY films have ionexchange properties. 202,204,205 Cations with hydrated radii larger than the channel radius of PB (such as, Li + , Na + , and H + ) should not be able to enter the rather rigid lattice of the PB film. 194 These properties allow the use of PB electrodes as potentiometric [195][196][197] and voltammetric [198][199][200] sensors for electroinactive cations.…”

“…The sensors for thallium ions Tl + , Cs + and K + pioneered the analytical applications of metal hexacyanoferrates. [201][202][203] Later a number of cationic analytes were enlarged, including NH 4 + , Rb + and other monoand divalent cations. 202,204,205 Cations with hydrated radii larger than the channel radius of PB (such as, Li + , Na + , and H + ) should not be able to enter the rather rigid lattice of the PB film.…”

Nanostructured Mimic Enzymes for Biocatalysis and Biosensing

“…The development of sensors for thallium [131], cesium [132], and potassium [133,134] pioneered the analytical applications of metal hexacyanoferrates. Later, the number of cationic analytes was enlarged, including ammonium [135], rubidium [136], and other mono-and divalent cations [137].…”

Chemical and biological sensors based on electroactive inorganic polycrystals

“…The development of sensors for thallium (Tl ϩ ) [15], cesium (Cs ϩ ) [34], and potassium (K ϩ ) [35,36] pioneered analytical applications of metal hexacyanoferrates (Table 13.1). The development of sensors for thallium (Tl ϩ ) [15], cesium (Cs ϩ ) [34], and potassium (K ϩ ) [35,36] pioneered analytical applications of metal hexacyanoferrates (Table 13.1).…”