Electrochemical determination of L-dopa at cobalt hexacyanoferrate/large-mesopore carbon composite modified electrode

Xue, Yan; Pan, Deng; Wang, Huan

doi:10.1016/j.jelechem.2011.09.024

Cited by 39 publications

(24 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3b). Note that two anodic peaks have been partly overlapped, which was similar to the literatures [35,45].…”

Section: Electrochemical Preparationsupporting

confidence: 85%

“…For instance, MHCF possesses notable electron mediating ability. A variety of MHCFs have been prepared and used for electrochemical sensors [30][31][32][33][34][35]. We previously described a miniaturized amperometric detector coupled to a microfluidic device using CNTs-cobalt hexacyanoferrate (CoHCF) modified graphite electrode; further a microchip electrophoresis-electrochemistry method was proposed [36].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

Luo

Pan

et al. 2015

Journal of Electroanalytical Chemistry

102

View full text Add to dashboard Cite

“…3b). Note that two anodic peaks have been partly overlapped, which was similar to the literatures [35,45].…”

Section: Electrochemical Preparationsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

Luo

Pan

et al. 2015

Journal of Electroanalytical Chemistry

102

View full text Add to dashboard Cite

“…The influences of some coexisting substances on the determination of L-dopa were investigated and the results are shown in Table 1 , and SO 4 2− did not show interference manner with L-dopa determination. As for the common interference in biological samples for the determination of L-dopa, different concentration of dopamine, uric acid, glucose, sucrose, fructose, urea, and starch had no effective interference with the current response of L-dopa (signal change <%5), suggesting that this proposed method has excellent L-dopa selectivity and is good candidate for determination of L-dopa in pharmaceutical and biological samples.…”

Section: Interference Studymentioning

confidence: 99%

“…L-dopa is converted to dopamine by enzymatic reaction with dopa-descarboxilase, compensating the deficiency of dopamine in organism [1]. With its serious side effects with long-term use on human health, e.g., gastritis, paranoia, and dyskinesia [2][3][4], L-dopa should be given an accurate analysis in both pharmaceutical formulations and biological fluids.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of levodopa in the presence of ascorbic acid by polyglycine/ZnO nanoparticles/multi-walled carbon nanotubes-modified carbon paste electrode

Afkhami

Kafrashi

Madrakian

2015

Ionics

View full text Add to dashboard Cite

This work report on electrodeposition of polyglycine microparticles onto zinc oxide (ZnO) nanoparticles/multi-walled carbon nanotube-modified carbon paste electrode surface in order to construction new levodopa (L-dopa) electrochemical sensor. The prepared electrode used for sensitive and selective determination of L-dopa in the presence of ascorbic acid. The electrochemical response of L-dopa on this modified electrode was studied using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. The effect of various experimental parameters including pH and scan rate on the voltammetric response of L-dopa was investigated. The results show that the process of oxidation of this compound is adsorption controlled. At the optimum conditions, the concentration of L-dopa was determined by differential pulse voltammetry, and a dynamic linear range of 5.0-500.0 μmol L −1 and detection limit of 0.08 μmol L −1 were obtained. The results of pharmaceutical and human urine samples' voltammetric analysis showed that using the proposed method, a precise and sensitive electrochemical determination of L-dopa is feasible.

show abstract

“…Also, electroanalytical methods have been presented for the quantification of levodopa. [18][19][20][21] Some of the described methods require long time electrode preparation and limited life time which can strongly influence the reproducibility of these electrodes. Usage of novel solid electrode materials can be beneficial in the field of electroanalysis.…”

Section: Introductionmentioning

confidence: 99%

Rapid electrochemical method for the determination of L-DOPA in extract from the seeds of Mucuna prurita

Stanković

Samphao²,

Dojčinović³

et al. 2016

ACSi

View full text Add to dashboard Cite

This work presents the electrochemical behavior of levodopa (L-DOPA), at boron-doped diamond (BDD) electrodes, using cycling voltammetry (CV), in Britton-Robinson (BR) buffer solution, and application of the proposed electrode for the determination of L-DOPA in extracts from the seeds of velvet bean (Mucuna prurita Hook or Mucuna pruriens (L.) DC.). L-DOPA provides a well-defined and single oval-shape oxidation peak at +0.8 V vs. Ag/AgCl (3 M KCl) reference electrode in BR buffer solution at pH 3.0. Experimental parameters, such as pH of supporting electrolyte and square wave voltammetry (SWV) operating parameters (frequency and modulation amplitude) were optimized. The effect of possible interferences was evaluated. Under optimal conditions the detection limit of the developed method was 0.8 μM and the calibration curve for L-DOPA was linear in the range from 2 to 100 μM. The proposed method was successfully applied to the determination of L-DOPA in an extract from the seeds of Mucuna prurita. The obtained result was in good agreement with obtained by photometry with 2,2´-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS). The developed approach can be beneficial for the quantification of L-DOPA using a BDD electrode as up-todate potential alternative sensor for electroanalytical applications.

show abstract

Electrochemical determination of L-dopa at cobalt hexacyanoferrate/large-mesopore carbon composite modified electrode

Cited by 39 publications

References 46 publications

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

An electrochemical sensor for hydrazine and nitrite based on graphene–cobalt hexacyanoferrate nanocomposite: Toward environment and food detection

Electrochemical determination of levodopa in the presence of ascorbic acid by polyglycine/ZnO nanoparticles/multi-walled carbon nanotubes-modified carbon paste electrode

Rapid electrochemical method for the determination of L-DOPA in extract from the seeds of Mucuna prurita

Contact Info

Product

Resources

About