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Évaluation Électrochimique Simultanée De L'acide Ascorbique, De L'épinéphrine Et De L'acide Urique À Une Électrode En Graphite De Crayon Jetable: Détermination Très Sensible Dans Les Produits Pharmaceutiques Et Les Liquides Biologiques Par Voltamétrie Dif

OBJECTIF ET OBJECTIF: Comme on le sait, AA, EP et UA peuvent également coexister dans des fluides biologiques. Par conséquent, la détermination des niveaux de ces composés dans les fluides biologiques est extrêmement importante pour le diagnostic et le traitement des maladies associées. En présence de nombreuses substances interférentes dans les liquides biologiques tels que les échantillons de sang et d'urine, il est très important que ces composés puissent être analysés de manière sélective. Matériels et méthodes: Toutes les expériences électrochimiques ont été effectuées à l'aide d'un potentiostat Autolab PGSTAT 128N. Avant de commencer les mesures électrochimiques, la PGE a été activée. Le prétraitement électrochimique de PG a été exercé par +1,40 V anodiquement pendant 60 s. Ensuite, les mesures ont été effectuées avec CV (-0,4 V à 1,2 V) et DPV (-0,2 V à 0,7 V) pour le comportement voltamétrique unique et simultané de AA, EP et UA dans le procédé électrochimique. RÉSULTATS: Les potentiels maximaux anodiques de AA et UA ont été observés à environ +0,32 V et +0,62 V, respectivement. Par contre, pour EP, alors que le pic de potentiel anodique était observé à environ +0,53 V, les potentiels de pic cathodique ont été observés à environ +0,41 V et + 0,007 V. Le pic de réduction observé à +0,3 V avec Les pics d'oxydation observés à +0,53 V sont les pics réversibles. Dans la méthode développée pour la détermination électrochimique simultanée de AA, EP et UA en utilisant la technique PGE avec DPV dans une solution tampon BR (pH 4,0), les potentiels des pics anodiques sont suffisamment séparés les uns des autres. CONCLUSION: Une méthode voltampérométrique a été développée pour la détermination simultanée de AA, EP et UA avec PGE pour la première fois. Ici, l’essentiel est que la détermination simultanée de AA, EP et UA ait été réalisée avec succès avec cette méthode voltampérométrique ciblée, sensible, peu coûteuse, pratique et bien répétée; et que ceux-ci se sont avérés être applicables de manière sélective dans les produits pharmaceutiques et les liquides biologiques.


Source: https://www.ncbi.nlm.nih.gov/pubmed/30215332


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