Potentiometric sensors with membranes based on ionic liquid tetradecylammonium triethylammonio-<Emphasis Type="Italic">closo</Emphasis>-dodecaborate |
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| Authors: | A V Kopytin K Yu Zhizhin Yu I Urusov V N Mustyatsa Yu V Kokunov N T Kuznetsov |
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| Institution: | 1.Kurnakov Institute of General and Inorganic Chemistry,Russian Academy of Sciences,Moscow,Russia;2.Mendeleev Russian Chemical Technological University,Moscow,Russia |
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| Abstract: | Polymer compositions based on the ionic liquid tetradecylammonium triethylammonium-closododecaborate (TTCD) are proposed as the main components of membranes of potentiometric sensors (ion-selective electrodes) for determining ions
B12H11N(C2H5)3]−. Two types of polymer compositions are considered: conventional, polyvinyl chloride (PVC)-liquid ion-exchanger (solution of TTCD in o-nitrophenyl octyl ether) and another, PVC-TTCD (ionophore-plasticizer). The optimal composition of membranes for both types
of electrodes are proposed, and their main electroanalytical parameters, such as selectivity, effect of pH, range of linear
response, reproducibility, and stability of potential, were measured. A comparative analysis of the electroanalytical parameters
of potentiometric sensors with membranes of two types is given. The detection limits for the electrodes of types I and II are 9 × 10−7 and 4 × 10−7 M. It is shown that B12H11N(C2H5)3]− anions can be determined by potentiometric titration with indicator electrodes of different types. |
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