Adsorptive stripping voltammetry of electroactive organic compounds

Kalvoda, R.

doi:10.1016/s0003-2670(00)84241-5

Cited by 74 publications

(24 citation statements)

References 15 publications

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“…On the other hand, the dependence of LS-AdASV peak current magnitudes of bly owing to an inhibition of the voltammetric process occurring after saturation of carbon [27] or interactions among the molecules in the adsorbed state become noticeable [28]. This could be explained by the release of an amount of the adsorbed molecules due to possible repulsive interaction between the adsorbed species when coverage of the electrode has been reached [28].…”

Section: Linear Sweep Stripping Voltammetry Methodsmentioning

confidence: 99%

Trace Determination of Duloxetine HCl in Formulation and Spiked Human Serum at a Carbon Paste Electrode

Hassanein¹,

Moharram²,

Oraiby³

et al. 2017

AJAC

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The electrochemical behavior of duloxetine HCl (DXT.HCl) at a carbon paste electrode (CPE) was achieved by cyclic voltammetry and a mechanism of its oxidation was reported and illustrated. A sensitive linear sweep and square-wave adsorptive anodic stripping voltammetry methods were described for trace determination of DXT.HCl. Introduction: DXT.HCl, N-methyl-3-(nap-thalen-1-yloxy)-3-(thiophene-2-yl) propan-1-amine hydrochloride is a selective serotonin-norepinephrine reuptake inhibitor (SNRI) originally developed as an antidepressant and is currently recommended for maintenance treatment of major depressive disorder. Methods: Electrochemical behavior was studied using cyclic voltammetric method, and the analytical application was studied using linear sweep and square wave voltammetric methods. Solution pH has been measured by pH meter. Results: The process on the surface of carbon paste electrode was found to be irreversible and diffusion-controlled. The number of proton and electron transferred were calculated. Possible reaction mechanism taking place on the surface of electrode was proposed. Calibration plot constructed using square wave voltammetric technique was used for quantitative analysis in pharmaceutical and human serum samples. Limit of detection (LOD) and limit of quantification (LOQ) were calculated. Conclusions: In the present work, we described the electrochemical behavior of DXT.HCl drug. Two precise linear sweep and square wave adsorptive anodic stripping voltammetry methods have been described for its trace quantitation in pharmaceutical formulation and human serum. The method shows the development of a sensor for selective and sensitive determination of DXT.HCl.How to cite this paper: Hassanein, A.M.,

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Section: Linear Sweep Stripping Voltammetry Methodsmentioning

confidence: 99%

Trace Determination of Duloxetine HCl in Formulation and Spiked Human Serum at a Carbon Paste Electrode

Hassanein¹,

Moharram²,

Oraiby³

et al. 2017

AJAC

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“…It is ascribed to the reduction of complex of Hg II and DA according to the literature. 8,9 After addition of Al III (Fig. 1c), a new sharp peak appears at -900 mV; that the height of the peak is proportional to the DA concentration was observed in further study.…”

Section: Resultsmentioning

confidence: 53%

“…The electrochemical behaviors of DA on various kinds of electrodes, including gold electrode, carbon fiber microelectrodes, glassy carbon electrodes, carbon paste electrode and hanging mercury drop electrode (HMDE), have been investigated extensively in the last two decades. [3][4][5][6][7][8][9] However, a series of biomolecules possessing similar structures and characters such as epinephrine (EP) and norepinephrine (NE), coexist with DA in biosystems, making their determination and recognition quite difficult. In addition, a high concentration of ascorbic acid in a biosystem greatly disturbs the anodic responses of DA.…”

Section: Introductionmentioning

confidence: 99%

Direct Voltammetric Specific Recognition of Dopamine Using AlIII-DA Complexes at the Hanging Mercury Drop Electrode

Zhang

Cheng

et al. 2007

ANAL. SCI.

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In this paper, we firstly report the direct voltammetric recognition and determination of dopamine (DA) by using Al III -DA complexes at the hanging mercury drop electrode (HMDE). A new sensitive cathodic peak of Al III -DA can be detected at -900 mV (vs. SCE) in 0.1 M NH4Cl-NH3·H2O-0.1 M KCl buffer solution at pH 8.5. This unique -900 mV cathodic peak arises from the specific interaction between Al III and DA on the HMDE, whereas other substances with similar structures, such as L-dopa, epinephrine (EP), norepinephrine (NE), catechols, caffeic acid (CA), trihydric phenols and tiron, do not yield any new peak on the voltammograms in the potential range from -100 to -1200 mV when Al III is added. The distinct voltammetric characteristic of the recognition of DA can effectively inhibit the interferences of both ascorbic acid and uric acid in the DA determination by the direct electrochemistry, which is a major difficulty when a solid electrode is used. The proposed method can be anticipated as an effective means for the recognition of DA in the elucidation of the mechanisms of Parkinson's disease (PD) and Alzheimer's disease (AD) in the presence of Al III .

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“…The method of adsorptive stripping analysis , both of adsorbable complexes and of electroactive organic ccirounds , appears very pranising , as it broadens the range of trace analysis down to concentrations below 1 Ig/Kg (ref. 44).…”

Section: Discussionmentioning

confidence: 99%

Polarographic determination of adsorbable molecules

Kalvoda¹

1987

Pure and Applied Chemistry

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Adsorptive stripping voltammetry of electroactive organic compounds

Cited by 74 publications

References 15 publications

Trace Determination of Duloxetine HCl in Formulation and Spiked Human Serum at a Carbon Paste Electrode

Trace Determination of Duloxetine HCl in Formulation and Spiked Human Serum at a Carbon Paste Electrode

Direct Voltammetric Specific Recognition of Dopamine Using AlIII-DA Complexes at the Hanging Mercury Drop Electrode

Polarographic determination of adsorbable molecules

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