2007
DOI: 10.1002/elan.200603712
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Electrochemical Behavior of Catecholamines and Related Compounds at In Situ Surfactant Modified Carbon Paste Electrodes

Abstract: The voltammetric characteristics of catecholamines: epinephrine (E) and norepinephrine (NE) and related compounds: isoproterenol, metanephrine, l-dopa, methyldopa, vanillylmandelic acid (VMA), and homovanillic acid (HVA) at unmodified and in situ surfactant-modified carbon paste electrodes were comparatively evaluated. For the basic and amphoteric compounds the modification of the electrode surface with submicellar concentrations of anionic surfactants (sodium dodecylsulfate, sodium decylsulfate or sodium dode… Show more

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Cited by 39 publications
(24 citation statements)
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“…Several methods have been used for the determination of benserazide in pharmaceutical preparations such as capillary electrophoresis [6][7][8][9][10], spectrophotometry [11][12][13][14][15][16], high performance liquid chromatography [17,18], chemiluminescence [19] and voltammetry [20,21]. As yet, no paper has been reported on the voltammetric determination of benserazide using IL-TiO 2 /CPE.…”
Section: Introductionmentioning
confidence: 99%
“…Several methods have been used for the determination of benserazide in pharmaceutical preparations such as capillary electrophoresis [6][7][8][9][10], spectrophotometry [11][12][13][14][15][16], high performance liquid chromatography [17,18], chemiluminescence [19] and voltammetry [20,21]. As yet, no paper has been reported on the voltammetric determination of benserazide using IL-TiO 2 /CPE.…”
Section: Introductionmentioning
confidence: 99%
“…On the basis of literature reports dealing with structurally similar systems, such as monomethylated catecholamine derivatives [4,5], surface-grafted [6] and electropolymerized [7] eugenol, one may predict that the oxidation reaction leads to the development of a reversible redox couple involving quinone/hydroquinone functionalities. This oxidative demetoxylation and formation of reversible redox couple can be easily observed on a cyclic voltammogram recorded in acidic electrolyte containing dissolved lignosulfonate (not shown).…”
mentioning
confidence: 99%
“…Compared to the bare GCE, the electrochemical response of PPy/CNP/ GCE reduces in the presence of the negatively charged analytes like Fe(CN) 6 4À (Figure 2A), but considerably in- creases when a positively charged analyte such as Ru(PPy) 3 2 + is present ( Figure 2B). This can be related to electrostatic interaction between the negative charge density of the modified film and the analytes, as it has been discussed in the literature for over-oxidized polypyrrole [39].…”
Section: Characterization Of Ppy/cnp/gce By Sem and CVmentioning
confidence: 96%
“…Sodium dodecylbenzenesulfonate (SDBS) was purchased from Fluka. Ascorbic acid (AA) and Potassium ferrocyanide (K 4 Fe(CN) 6 ) were purchased from Merck. Ru(bpy) 3 Cl 2 was synthesize in our laboratory based on a reported procedure [37].…”
Section: Reagentsmentioning
confidence: 99%
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