Ion-selective electrodes based on p-1-adamantylcalix[8]arene ionophores for the determination of amino compounds
| Autor: | Elvira Shokova, Igor V. Pletnev, N. V. Shvedene, A. K. Rozov, M. Yu. Nemilova, Vladimir Kovalev |
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| Rok vydání: | 1995 |
| Předmět: |
chemistry.chemical_classification
Potentiometric titration Metals and Alloys Ionophore Phenylalanine Condensed Matter Physics Medicinal chemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion selective electrode Amino acid Membrane chemistry Calixarene Materials Chemistry Organic chemistry Amine gas treating Electrical and Electronic Engineering Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 27:372-376 |
| ISSN: | 0925-4005 |
| Popis: | The 'lower rim' functionalized derivatives of p-1-adamantylcalix[8]arene (octa(trifluoroacetyl-), L 1 , and octa(ethoxycarbonylmethoxy-), L 2 , were used as ionophores in PVC membranes of ion-selective electrodes (ISEs). The responses of electrodes towards primary amines (n-octylamine, 2-phenylethylamine) and amino acid esters are reported. The host L 1 failed as ionophore, while the L 2 -based ISE exhibited quasi-Nernstian function (with detection limits at 10 -5 M level) for n-octylamine and 2-phenylethylamine, as well as for methyl esters of phenylalanine and phenylglycine. Addition of lipophilic ionic associate tetraphenylborate-analyte was found to be useful for the enhancing of operation stability. Alkali metals and some amines practically do not affect potentiometric determination of n-octylamine and amino acid esters. In agreement with the concept of H-bonding in the host-guest complex, the interference increases in the following order : tertiary < secondary < primary amines. All ISEs studied exhibit extremely short response time (5-10 s) in wide pH and analyte concentration ranges. |
| Databáze: | OpenAIRE |
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