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  • Voltammetric Detection of Urea on an Ag-Modified

    Cited by: 31
  • Voltammetric Detection of Urea on an Ag-Modified

    2015-11-24  Voltammetric Detection of Urea on an Ag-Modified Zeolite-Expanded Graphite-Epoxy Composite Electrode Florica Manea 1,*, Aniela Pop 1, Ciprian Radovan 2, Plamen Malchev 3, Adriana Bebeselea 1, Georgeta Burtica 1, Stephen Picken 3 and Joop Schoonman 3 1 “Politehnica” University of Timi şoara, P-ta Victoriei, nr.2, 300006, Timişoara, Romania;

  • Voltammetric detection of urea on an Ag-modified

    Voltammetric detection of urea on an Ag-modified zeolite-expanded graphite-epoxy composite electrode F Manea, A Pop, C Radovan, PG Malchev, A Bebeselea, G Burtica, SJ Picken , J Schoonman ChemE/Materials for Energy Conversion Storage

  • (PDF) Voltammetric Detection of Urea on an Ag

    Voltammetric Detection of Urea on an Ag-Modified Zeolite-Expanded Graphite-Epoxy Composite Electrode

  • CiteSeerX — Voltammetric detection of urea on an Ag ...

    BibTeX @ARTICLE{Manea_voltammetricdetection, author = {Florica Manea and Aniela Pop and Ciprian Radovan and Plamen Malchev and Adriana Bebeselea and Georgeta Burtica and Stephen Picken and Joop Schoonman}, title = {Voltammetric detection of urea on an Ag-modified zeolite-expanded graphite-epoxy composite}, journal = {Sensors}, year = {}, pages = {5806--5819}}

  • Voltammetric Detection of Urea on an Ag-Modified

    Voltammetric Detection of Urea on an Ag-Modified Zeolite-Expanded Graphite-Epoxy Composite Electrode By Joop Schoonman, Stephen Picken, Georgeta Burtica, Adriana Bebeselea, Plamen Malchev, Ciprian Radovan, Aniela Pop and Florica Manea

  • Voltammetric Detection of Urea on an Ag-Modified

    Cited by: 31
  • (PDF) Voltammetric Detection of Urea on an Ag

    Voltammetric Detection of Urea on an Ag-Modified Zeolite-Expanded Graphite-Epoxy Composite Electrode.pdf Sensors 2008 , 8 , 5806-5819; DOI : 10.3390/s8095806 sensors

  • Ag/ZnO Catalysts with Different ZnO Nanostructures

    The Ag/ZnO nanorod catalysts also show a significant reduction in the onset voltage (0.410 V vs. Ag/AgCl) and an increase in the current density (12.0 mA cm −2 mg −1) at 0.55 V vs Ag/AgCl. The results on urea electrooxidation show that Ag/ZnO nanostructures can be a potential catalyst for non‐enzymatic biosensors and fuel cells.

  • Voltamperometric Discrimination of Urea and

    位置: 8600 Rockville Pike, Bethesda, MD
  • Voltammetric Detection of Urea on an Ag-Modified

    Voltammetric Detection of Urea on an Ag-Modified Zeolite-Expanded Graphite-Epoxy Composite Electrode By Joop Schoonman, Stephen Picken, Georgeta Burtica, Adriana Bebeselea, Plamen Malchev, Ciprian Radovan, Aniela Pop and Florica Manea

  • CiteSeerX — Voltammetric detection of urea on an Ag ...

    BibTeX @ARTICLE{Manea_voltammetricdetection, author = {Florica Manea and Aniela Pop and Ciprian Radovan and Plamen Malchev and Adriana Bebeselea and Georgeta Burtica and Stephen Picken and Joop Schoonman}, title = {Voltammetric detection of urea on an Ag-modified zeolite-expanded graphite-epoxy composite}, journal = {Sensors}, year = {}, pages = {5806--5819}}

  • (PDF) Electrochemical determination of urea using a

    to urea concentration from 0.1 to 30 mM, a detection limit of 36 µM, a relative standard deviation of 2.43% ( n = 18), and excellent storage stability, as the current decrease was only 3%

  • Voltammetric Detection of Urea on an Ag-Modified

    Title: Voltammetric Detection of Urea on an Ag-Modified Zeolite- Expanded Graphite-Epoxy Composite Electrode: Published in: Sensors, 8 (9), 2008. ISSN 1424-8220.

  • Voltammetric Detection of Catechol and Dopamine Based on ...

    2020-4-22  Voltammetric Detection of Catechol and Dopamine Based on a Supramolecular Composite pPrepared from Multifarene[3,3] and Reduced Graphene Oxide Electroanalysis ( IF 2.544) Pub Date : 2020-03-18, DOI: 10.1002/elan.201900772

  • Voltammetric detection of uric acid in the presence of ...

    1. Introduction. The development of voltammetric sensors for the determination of uric acid (UA) in human fluid such as urine and serum has received considerable interest in recent years , , , , .UA is a primary end product of purine metabolism and abnormal levels of UA are symptoms of several diseases like gout, hyperuricaemia and Lesch–Nyhan syndrome .

  • Simultaneous voltammetric detection of ammonium

    The electrochemical characterization of ammonium and nitrite envisaging their oxidation processes on Ag-CNT electrode was studied by the cyclic voltammetry in the presence of 0.1 M Na 2 SO 4 as supporting electrolyte (Fig. 2a). 0.2 mM NH 4 + concentrations were added continuously and corresponding CV was recorded until NH 4 + concentration reached 1 mM, after each the same

  • Voltammetric Detection of Catechol and Dopamine

    The modified electrode, best operated at a potential around 0.16 V vs. Ag/AgCl, displayed a differential pulse voltammetric response in the linear concentration range of 10–100 nM within a detection limit of 0.51 nM (at S/N=3).

  • Voltamperometric Discrimination of Urea and

    位置: 8600 Rockville Pike, Bethesda, MD
  • Elaboration of an Imprinted Polymer Film Based on

    Elaboration of an Imprinted Polymer Film Based on Chitosan Electrodeposition for the Voltammetric Detection of BPA Hajer Chakroun Galai,1,2 Philippe Namour,3 Anne Bonhomme,2 François Bessueille,2 Salma Besbes Hentati,1 and Nicole Jaffrezic-Renault2,z 1University of Carthage, Faculty of Sciences of Bizerte, LR13ES08, Laboratory of Materials Chemistry, 7021Bizerte, Tunisia

  • Voltammetric Detection of Catechol and Dopamine

    The modified electrode, best operated at a potential around 0.16 V vs. Ag/AgCl, displayed a differential pulse voltammetric response in the linear concentration range of 10–100 nM within a detection limit of 0.51 nM (at S/N=3).

  • Selective Voltammetric and Amperometric Detection

    2019-5-26  Voltammetric detection of uric acid in the presence of ascorbic acid at a gold electrode modified with a self-assembled monolayer of heteroaromatic thiol. Journal of Electroanalytical Chemistry 2003, 540, 69-77. DOI: 10.1016/S0022-0728(02)01285-8.

  • Elaboration of an Imprinted Polymer Film Based on

    Elaboration of an Imprinted Polymer Film Based on Chitosan Electrodeposition for the Voltammetric Detection of BPA Hajer Chakroun Galai,1,2 Philippe Namour,3 Anne Bonhomme,2 François Bessueille,2 Salma Besbes Hentati,1 and Nicole Jaffrezic-Renault2,z 1University of Carthage, Faculty of Sciences of Bizerte, LR13ES08, Laboratory of Materials Chemistry, 7021Bizerte, Tunisia

  • WO1980002849A1 - Pulsed voltammetric detection of ...

    Reliable and rapid detection of microorganisms is accomplished in an electroanalytical cell using a pulsed voltammetric detection technique employing the growth medium as the electrolyte and analyte and using simple wire electrodes fabricated from readily available materials. Organism detection occurs as a consequence of the depletion of oxygen in the growth medium/electrolyte caused by ...

  • Spectrometric and Voltammetric Analysis of Urease

    This enzyme is substrate-specific, which means that the enzyme catalyzes thehydrolysis of urea only. This feature is a basic diagnostic criterion used in thedetermination of many bacteria species. Most of the methods utilized for detection ofurease are based on analysis of its enzyme activity – the hydrolysis of urea.

  • Electrochemical Detection of Carbamate Pesticides at ...

    2019-5-25  Conductive boron-doped diamond thin-film electrodes were used for the electrochemical detection of selected N-methylcarbamate pesticides (carbaryl, carbofuran, methyl 2-benzimidazolecarbamate, bendiocarb) after liquid chromatographic separation. Two kinds of detection methods were adopted in this study. In the first method, a direct detection of underivatized pesticides

  • Voltammetric determination of ascorbic acid by using

    Abstract. The authors describe a disposable non-enzymatic sensor for ascorbic acid (AA) that was obtained by modifying a screen printed electrode (SPE) with Cu(OH) 2 nanorods (NRs). The NRs were synthesized by a wet chemical process which involves sequential addition of NH 3 and NaOH to CuSO 4 solution. NR formation was confirmed by thermogravimetric, spectroscopic, microscopic, and ...

  • Electrochemical Determination of Dopamine on a

    Application of mixed ruthenium oxide hexacyanoferrate/ruthenium hexacyanoferrate glassy carbon electrode for electrochemical determination of dopamine (DA) is described for the first time. The overlapped voltammetric oxidation potentials of ascorbic acid (AA) and DA are separated and shifted to more facile direction, +170 and +320 mV versus Ag/AgCl, respectively.

  • Voltamperometric discrimination of urea and

    Detection limits in milk samples adulterated with 1% of its total nitrogen derived from melamine or urea were as low as 85.0 mg L(-1) and 121.4 mg L(-1), respectively. We present this method as a fast and robust screening method for milk adulteration analysis and prevention of food intoxication.

  • Functionalized nitrogen doped graphene quantum dots and ...

    2018-12-7  A novel molecularly imprinted polymer-capped acrylated nitrogen doped graphene quantum dots and bimetallic Au/Ag core-shell was synthesized to serve as a sensing nano-hybrid film for the detection of an anticancerous drug, hydroxyurea.

  • Spectrometric and Voltammetric Analysis of Urease

    This enzyme is substrate-specific, which means that the enzyme catalyzes thehydrolysis of urea only. This feature is a basic diagnostic criterion used in thedetermination of many bacteria species. Most of the methods utilized for detection ofurease are based on analysis of its enzyme activity – the hydrolysis of urea.

  • 10.1016/S0956-5663(96)00073-5 DeepDyve

    CONCLUSIONS A voltammetric urea-sensing electrode was prepared by making a lipid-attached urease layer on a mercaptohydroquinone-modified gold electrode. The present measuring method is subject to influences by pH values and buffer capacities of O4 "=- 2 TABLE 1 Comparison of results obtained for urea in human urine by different methods.

  • Ultrathin nickel-metal–organic framework nanobelt

    Ultrathin nickel-metal–organic framework (Ni-MOF) nanobelts, [Ni20(C5H6O4)20(H2O)8]40H2O (Ni-MIL-77), have been exploited successfully for the fabrication of a non-enzymatic urea sensor. Ni-MOF ultrathin nanobelts in alkaline media can be used as an efficient catalyst for urea electrooxidation. As

  • CA1158720A - Pulsed voltammetric detection of

    ABSTRACT Reliable and rapid detection of microorganism is accomplished in an electroanalytical cell using a pulsed voltammetric detection technique employing the growth medium as the electrolyte and analyte and using simple wire electrodes fabricated from readily available materials. Organism detection occurs as a consequence of the depletion of oxygen in the growth medium/electrolyte caused ...

  • Elaboration of an Imprinted Polymer Film Based on

    A voltammetric sensor for bisphenol A (BPA) detection was developed. It was based on a gold electrode modified by an electrodeposited molecularly imprinted chitosan (CS) film. Fourier Transformed Infrared spectroscopy, scanning electron microscopy and electrochemistry were used to characterize and compare the surface of the molecularly ...

  • Detection of prostate cancer using a voltammetric ...

    Detection of prostate cancer using a voltammetric electronic tongue† Lluís Pascual,a Inmaculada Campos,a José-Luis Vivancos,*a,b,c,d Guillermo Quintás,e,f Alba Loras,d M. Carmen Martínez-Bisbal,*a,c Ramón Martínez-Máñez,a,c,d,g Francisco Boronath and José Luis Ruiz-Cerdàd,h A simple method based on the multivariate analysis of data from

  • Application of a modified graphene nanosheet paste ...

    Electrochemical sensors and biosensors for pharmaceutical, food, agricultural and environmental analyses have been growing rapidly due to electrochemical behavior of drugs and biomolecules and partly due to advances in electrochemical measuring systems. In the present work, we describe the preparation of a new electrode composed of graphen (G) modified with 2,7-bis(ferrocenyl ethyl)

  • Sensitive Voltammetric Determination of Ticlopidine in ...

    ticlopidine and also a lower detection limit. Using differential pulse voltammetric modality, the obtained analytical curve was linear for ticlopidine concentration ranging from 0.75 to 20 µmol L–1, with detection limit of 0.10 µmol L–1. The proposed method was successfully used to determination of ticlopidine in

  • A Voltammetric Sensor Based on NiO Nanoparticle

    A carbon-paste electrode modified with ferrocenecarboxaldehyde and NiO nanoparticle (NiO/NPs) was used for the sensitive and selective voltammetric determination of cysteamine in the presence of tryptophan. The oxidation of cysteamine at the modified electrode was investigated by cyclic voltammetry (CV), chronoamperometry, and square-wave voltammetry (SWV).

  • Chemical analysis in basic chemicals manufacturing

    2019-3-12  Analytical techniques are required to determine the purity of urea. Ion chromatography is an excellent technique for impurity analysis. Using anion chromatography with chemical suppression and conductivity detection, you can analyze traces of impurities reliably and accurately, e.g., chloride, cyanate, nitrate, and sulfate.