Selective determination of L-dopa in the presence of uric acid and ascorbic acid at a gold nanoparticle self-assembled carbon nanotube-modified pyrolytic graphite electrode

Hu, Guangzhi; Chen, Long; Guo, Yong; Wang, Xiaolai; Shao, Shijun

doi:10.1016/j.electacta.2010.03.069

Cited by 73 publications

(45 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Unfortunately, most of the unmodified solid electrodes show a slow electron transfer for the electrochemical oxidation of L-dopa with a high overpotential [14]. The oxidation product of L-dopa easily adsorbs at the bare electrode surface, leading to the poor reproducibility and repeatability of these unmodified electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…Nanomaterials have attracted considerable attention of the analysts in the last decade due to their special physical and chemical properties [14,[18][19][20]. Among various nanomaterials, zinc oxide (ZnO) nanoparticles quickly matured as a versatile functional material for several applications, such as chemical and biological sensors [21], solar energy conversion [22], photocatalysis [23], piezoelectric sensors [24], nanogenerator [25], and varistor [26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Section: Introductionmentioning

confidence: 99%

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

show abstract

“…Particularly in the sensing technology, AuNPs/CNTs have great promise as an enzyme-free electrode material for electrochemical sensors due to the favorable electrocatalytic activity of AuNPs toward many chemical reactions coupled to the high electrical conductivity of CNTs, which promote the electron transfer between the redox active site and the electrode [7,58]. It has been found that AuNPs/CNTs present a superb potential in detecting hydrogen peroxide (H 2 O 2 ) [59,60], which is a cytotoxic substance to a wide range of cells and organisms [61,62], however, it is essentially employed in various fields such as food production, chemical and pharmaceutical industries.…”

Section: Introductionmentioning

confidence: 99%

Size-tailored synthesis of gold nanoparticles and their facile deposition on AAO-templated carbon nanotubes via electrostatic self-assembly: Application to H2O2 detection

Pannopard

Boonyuen

Warakulwit

et al. 2015

Carbon

View full text Add to dashboard Cite

“…53 The possible interferences of several organic compounds were tested with 0.05 mM BPA and BPS using differential pulse voltammetry (DPV). Organic compounds of twofold excess, such as UR, UA, DA, and AA, were tested (Fig.…”

Section: Characterization Of Electrochemical Behavior Ofmentioning

confidence: 99%

Selective Sensing of Bisphenol A and Bisphenol S on Platinum/Poly(diallyl dimethyl ammonium chloride)-diamond Powder Hybrid Modified Glassy Carbon Electrode

Zhang

Liu

Wang

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

In this work, a new platinum (Pt) nanoparticles-functionalized poly(diallyl dimethyl ammonium chloride) (PDDA)-diamond powder (DMP) composite-modified glassy carbon electrode (GCE) was fabricated for electrochemical sensing of the selective or simultaneous determination of bisphenol A (BPA) and bisphenol S (BPS). The Pt/PDDA-DMP hybrid was characterized by Scanning electron microscopy, Transmission electron microscope, Fourier transform infrared, X-ray diffraction analyzer. This hybrid exhibited remarkable electrocatalytic activity towards the oxidation of BPA and BPS. The simultaneous determination of BPA and BPS by cyclic voltammetry yielded a difference of 0.316 V, which was sufficiently large for their potential recognition and simultaneous detection in mixtures. Differential pulse voltammetry was successfully used to simultaneously quantify BPA and BPS within the concentration range of 5-30 and 10-60 μM under optimal conditions, respectively. The detection limits (S/N = 3) of Pt/PDDA-DMP/GCE for BPA and BPS were 0.6 and 2.0 μM, respectively. The fabricated electrode showed good sensitivity, stability, and selectivity. The proposed method was successfully applied to determine BPA and BPS in biological samples. Bisphenol A (BPA) [2,2-bis (4-hydroxyphenyl) propane (C 15 H 16 O 2 )] is an important chemical raw material that is widely used in industrial production and daily life.1-3 It is extensively used in food cans, packing materials, water bottles, and baby bottles. As an environmental hormone material that causes abnormal hormone activity, BPA causes irreversible damage to organisms and the environment, and low doses can even result in human endocrine disorders. 5,6 In addition, BPA negatively affects female hormones, which can lead to a series of female diseases, such as induced precocious puberty, reproductive dysfunction, endometrial hyperplasia, and recurrent miscarriage. 7,8 Canada and China banned the use of BPA in baby bottles in 2010 and 2011, respectively, because of its negative effects on humans, particularly to children and infants. 9 In recent years, numerous companies and factories are currently using bisphenol S (BPS) [4,4 sulfomyldiphenol (C 12 H 10 O 4 S)] instead of BPA.10 BPS is widely used in polyethersulfone. The production and use of BPS as a chemical additive in pesticides, dyestuffs, colorfast agents, dye dispersants, and monomer in cyclic carbonates are increasing and will exceed those of BPA. 11,12 Although BPS has high thermal stability and low biodegradability, 13 it also has biological toxicity 14,15 and negative hormone effects.16,17 BPS and BPA disrupt the human endocrine system by interfering with several functional nuclear receptors.18 Thus, BPS is not a safe and reliable replacement for BPA. Several methods are available for state of the art tools for detecting BPS and BPA, such as automated on-line column-switching high performance liquid chromatography isotope dilution tandem mass spectrometry, 19 analytical paralysis gas chromatography mass spectrometry, 20 synchronous...

show abstract

Selective determination of L-dopa in the presence of uric acid and ascorbic acid at a gold nanoparticle self-assembled carbon nanotube-modified pyrolytic graphite electrode

Cited by 73 publications

References 42 publications

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

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

Size-tailored synthesis of gold nanoparticles and their facile deposition on AAO-templated carbon nanotubes via electrostatic self-assembly: Application to H2O2 detection

Selective Sensing of Bisphenol A and Bisphenol S on Platinum/Poly(diallyl dimethyl ammonium chloride)-diamond Powder Hybrid Modified Glassy Carbon Electrode

Contact Info

Product

Resources

About