Detection of Ascorbic Acid Using a Carbon Fiber Microelectrode Coated with Cobalt Tetramethylpyridoporphyrazine

Abstract

A carbon microfiber electrode coated with an electrodeposited cobalt chelate of a tetra-N-methylpyridoporphyrazinocobalt derivative has been used for the potentiometric detection of ascorbic acid. It is effective over a fairly wide range of ascorbic acid concentration and may have value for in vivo analysis.

Sodium Alpha Olefin Sulfonate Modified Carbon Paste Electrode Sensor for Dopamine: A Voltammetric Study

“…It has been widely used in foods and drinks as an antioxidant and also for the prevention and treatment of common cold, mental illness, infertility, cancer and AIDS [33,34]. Now-a-days this compound has been the subject of many electrochemical investigations and on the basis of such studies; several methods have been developed for its determination in various samples [35][36][37][38][39][40][41][42].…”

Carbon Nanotubes in Electrochemical Sensors

“…The net results of this electron shuttling are a lowering of the overvoltage of analyte oxidation to the formal potential of the mediator and an increase in current density. Different derivatives of hydroquinone (Mazloum-Ardakani et al, 2010b) and transition metal complexes (Amini et al, 2001;Janda et al, 1996;Shahrokhian et al, 2004) are well known as electron mediators or modifiers in the electrocatalytic determination of some important compounds by voltammetric sensors. These modifiers have a high electron transfer rate constant.…”

Comparative bioavailability of synthetic vitamin C and Nutra-C (calcium ascorbate) in Korean healthy volunteers

“…[26][27][28] Hyphenated instruments consisting of flow injection analysis, [29][30][31][32] high performance liquid chromatography [33][34][35] or capillary electrophoresis [36][37][38][39] instruments and a detector are mostly utilized for the determination of Vitamic C. Liquid chromatography is a successful method for vitamin C determination when selectivity and specificity are concerned. [40][41][42] The objective of the present study was to determine the relative bioavailability of synthetic Vitamin C and Nutra-C ® in Korean healthy volunteers.…”