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Title

SIMULTANEOUS VOLTAMMETRIC DETERMINATION OF N-ACETYL-L-CYSTEINE, URIC ACID AND TRYPTOPHAN AT SURFACE OF GLASSY CARBON ELECTRODE IN THE PRESENT OF 4-CHLOROCATECHOL AS A HOMOGENEOUS ELECTROCHEMICAL CATALYST

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Abstract

 INTRODUCTION: N-ACETYL-L-CYSTEINE (NAC) IS AN ACETYLATED DERIVATIVE OF THE L-CYSTEINE, AS AN AMINO ACID. IT HAS BEEN EFFICIENT IN THE TREATMENT OF, SMOKING CESSATION, CARDIOVASCULAR, HEPATITIS C AND OTHER DISEASES [1]. URIC ACID (UA) IS THE END PRODUCT OF PURINE METABOLISM, SINCE ITS ABNORMAL CONCENTRATION LEVELS LEAD TO HYPERURICAEMIA AND GOUT [2]. TRYPTOPHAN (TRP) IS NECESSARY AMINO ACID FOR HUMAN AND HERBIVORES TO PLAYS AN ESSENTIAL ROLE IN BRAIN FUNCTIONS [3].4-CHLOROCATECHOL HAS BEEN USED AS AN ELECTRON TRANSFER MEDIATOR IN ELECTROCHEMICAL PROCESSES DUE TO THEIR HIGH ELECTRON TRANSFER EFFICIENCY, EXCELLENT REDOX REVERSIBILITY AND LOW COST [4]. IN THIS STUDY, THE ACTIVITY OF 4-CHLOROCATECHOL AS AN ELECTROCHEMICAL CATALYST FOR ELECTROOXIDATION OF NAC HAS BEEN INVESTIGATED AT THE SURFACE OF A GLASSY CARBON ELECTRODE (GCE). HERE, A SIMPLE AND SENSITIVE METHOD WAS REPORTED FOR SIMULTANEOUS VOLTAMMETRIC DETERMINATION OF NAC, UA AND TRP.

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