STUDY OF THE PRECONCENTRATION OF ORGANIC COMPOUNDS ON THE CARBON PASTE ELECTRODE FOR THEIR VOLTAMMETRIC DETERMINATION IN TRACE AMOUNTS
Abstract
THE PHENOMENON OF ADSORPTION AND THE TECHNIQUE OF ADSORPTIVE STRIPPING VOLTAMETRY (ADSV) ARE DISCUSSED FROM THEORETICAL AND PRACTICAL POINT OF VIEW (PRINCIPLES, TECHNIQUE DEVELOPMENT, PRACTICAL CONSIDERATIONS ETC) IN THE THEORETICAL PARTOF THIS THESIS. AN ADSORPTIVE STRIPPING VOLTAMETRY ANALYSER IS PRESENTED IN THE EXPERIMENTAL PART. THE SYSTEM IS CONSTRUCTED USING VARIOUS COMMERCIAL AND LABORATORY-BUILT DEVICES AND IS INTERFACED WITH A MICROCOMPUTER AMSTRAD CPC-6128. THE GENERAL STUDY OF THE CARBON PASTE ELECTRODE (CPE) CONCERNING THE METHOD OF ITS PREPARATION AND ACTIVATION IS PRESENTED USING THE ANALYSER. AFTER THIS, THEABILITY OF SEVERAL CLASSES OF ORGANIC COMPOUNDS SUCH AS ANILINE AND SOME OF ITS N-ALKYLATED DERIVATIVES, SCOPOLETIN, UMPELLIFERONE AND ESCULIN (COUMARINS), FLAVONOIDS (RUTIN, QUERCETIN ETC), EUGENOL AND ISOEUGENOL (PHENOLIC ETHERS) AND INDOLE AND SOME OF ITS DERIVATIVES (L-TRYPTOPHAN, HARMALINE, METHYL-DERIVATIVESARE EXAMINED CONCERNING THEIR PRECONCENTRATION ON THE ...
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