STUDY OF LYSINE AND ALANINE DELIVERANCE THROUGH POLYPYRROLE MEMBRANE

Electropolymerization processes of pyrrole and the usage of polypyrrole membrane as lysine and alanine deliverance have been studied by cyclic voltammetry technique. Polypyrrole membrane was prepared by electropolymerization processes of pyrrole in water based solvent containing sodium perchlorate as supporting electrolyte. Electropolymerization processes were carried out within potential range of 0-1100 mV vs Ag/AgCl reference electrode and at the scanning rate of 100 mV/s. In this study, lysine and alanine have been used as molecules which could easily be loaded on and released from polypyrrole membrane. The presence of lysine or alanine during electropolymerization process reduced the rate of electropolymerization of polypyrrole. In lysine or alanine transfer processes into polypyrrole membrane, the interaction between polypyrrole and lysine or alanine showed by the curve of E½ oxidation in respect of - log C. It proved that the E½ oxidation shifted to more positive potential showed by the increasing of concentration of lysine or alanine. Beside that, voltammetric responses of lysine and alanine transfered into polypyrrole membrane were found to be Nernstian. The results indicated that polypyrrole could be used as a sensor of lysine and alanine. Keywords: Electropolymerization, polypyrrole membrane, voltammetry technique

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STUDY OF ELECTROPOLIMERIZATION PROCESSES OF PYRROLE BY CYCLIC VOLTAMMETRIC TECHNIQUE

Indonesian Journal of Chemistry ◽

10.22146/ijc.21864 ◽

2010 ◽

Vol 4 (2) ◽

pp. 117-124

Author(s):

Adhitasari Suratman ◽

Buchari Buchari ◽

Indra Noviandri ◽

Suryo Gandasasmita

Keyword(s):

Supporting Electrolyte ◽

Sodium Perchlorate ◽

Reference Electrode ◽

Oxidation Potential ◽

Electroactive Polymer ◽

Cyclic Voltammetric ◽

Scanning Rate ◽

Ph Values ◽

Ph Range ◽

Voltammetric Technique

Electropolymerization processes and electrochemical properties of polypyrrole as electroactive polymer have been studied by cyclic voltammetric technique. Pyrrole was electropolymerized to form polypyrrole in water-based solvent containing sodium perchlorate as supporting electrolyte in several pH values. The pH of the solutions were varied by using Britton Robinson buffer. The results showed that oxidation potential limit of electropolymerization processes of pyrrole was 1220 mV vs Ag/AgCl reference electrode. It can be seen that cyclic voltammetric respon of polypyrrole membrane that was prepared by electropolymerization processes of pyrrole at the scanning rate of 100 mV/s was stable. While the processes of pyrrole electropolymerization carried out at the variation of pH showed that the best condition was at the pH range of 2 - 6. Keywords: polypyrolle, electropolymer, voltammetric technique

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THE DEVELOPMENT OF GLUCOSE SENSOR BASED ON SiO2-CuO MATERIALS USING SCREEN PRINTED CARBON ELECTRODE (SPCE)

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.v12i1.770 ◽

2016 ◽

Vol 12 (1) ◽

Author(s):

Intan Frina Utamiyanti

Keyword(s):

Cyclic Voltammetry ◽

Glucose Sensor ◽

Reference Electrode ◽

Synthesis Process ◽

Potential Range ◽

Carbon Electrode ◽

Screen Printed Carbon Electrode ◽

Cyclic Voltammetry Method ◽

Cyclic Voltammetry Analysis ◽

Screen Printed

The development of material-based glucose sensor SiO2-CuO using Screen Printed Carbon Electrode (SPCE) had been done. Three types of materials were used to detect glucose, i.e Multi Wall Carbon Nanotube (MWCNT)-SiO2-CuO, SiO2-CuO (A) dan SiO2-CuO (B). The differences composition of SiO2-CuO(A) and SiO2-CuO(B) occurred during the addition of NaOH in synthesis process of SiO2-CuO (B). The prepared materials were analyzed by Scanning Electron Microscopy (SEM), cyclic voltammetry method and chrono-amperometry. Cyclic voltammetry analysis was conducted at a potential range of -1.0 - 1.5 V with Ag/AgCl as reference electrode. The scan rate was 100 mV/sec and the potential was varied at (-0.6), (-0.5) and (-0.4) V, in which the duration of each analysis was 5 second. Based on the result of analysis, whether by SEM, cyclic voltammetry and chrono-amperometry, the SiO2-CuO (B) was found to be the best material for detection of glucose.

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THE DEVELOPMENT OF GLUCOSE SENSOR BASED ON SiO2-CuO MATERIALS USING SCREEN PRINTED CARBON ELECTRODE (SPCE)

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.v12i1.942 ◽

2016 ◽

Vol 12 (1) ◽

pp. 50

Author(s):

Intan Frina Utamiyanti ◽

Barlah Rumhayati ◽

Ani Mulyasuryani

Keyword(s):

Cyclic Voltammetry ◽

Glucose Sensor ◽

Reference Electrode ◽

Synthesis Process ◽

Potential Range ◽

Carbon Electrode ◽

Screen Printed Carbon Electrode ◽

Cyclic Voltammetry Method ◽

Cyclic Voltammetry Analysis ◽

Screen Printed

The development of material-based glucose sensor SiO2-CuO using Screen Printed Carbon Electrode (SPCE) had been done. Three types of materials were used to detect glucose, i.e Multi Wall Carbon Nanotube (MWCNT)-SiO2-CuO, SiO2-CuO (A) dan SiO2-CuO (B). The differences composition of SiO2-CuO(A) and SiO2-CuO(B) occurred during the addition of NaOH in synthesis process of SiO2-CuO (B). The prepared materials were analyzed by Scanning Electron Microscopy (SEM), cyclic voltammetry method and chrono-amperometry. Cyclic voltammetry analysis was conducted at a potential range of -1.0 - 1.5 V with Ag/AgCl as reference electrode. The scan rate was 100 mV/sec and the potential was varied at (-0.6), (-0.5) and (-0.4) V, in which the duration of each analysis was 5 second. Based on the result of analysis, whether by SEM, cyclic voltammetry and chrono-amperometry, the SiO2-CuO (B) was found to be the best material for detection of glucose.

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Electrochemical Response of Gold Nanoparticles at a Graphite Electrode

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1040.297 ◽

2014 ◽

Vol 1040 ◽

pp. 297-302 ◽

Cited By ~ 1

Author(s):

D.O. Perevezentseva ◽

E.V. Gorchakov

Keyword(s):

Gold Nanoparticles ◽

Cyclic Voltammetry ◽

Electrochemical Oxidation ◽

Phase Structure ◽

Graphite Electrode ◽

Supporting Electrolyte ◽

Potential Range ◽

Cyclic Voltammogram ◽

Cathodic Peak ◽

Graphite Electrodes

The electrochemical activity of gold nanoparticles at graphite electrodes by the method of cyclic voltammetry is studied. In this article the nature of the supporting electrolyte, modification time of graphite electrode by gold nanoparticles and the potential range on the value of the “inverse” cathodic peak are investigated. The “inverse” cathodic peak of gold nanoparticles formed in the reaction mixture HAuCl4:Na3C6H5O7:NaBH4=1:1:4 is observed on the cathodic branch of cyclic voltamperegram at Ec = 0.05 V at graphite electrode. The mechanism of stepwise electrochemical oxidation and reduction of the phase structure of gold on the surface of the graphite electrode in 0.1 M NaOH is offered. The “inverse” cathodic peak of gold nanoparticles on the cathodic branch of cyclic voltammogram at graphite electrode is caused by oxidation of Au2O to Au2O3.

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Novel Nickel (II), Copper (II) and Cobalt (II) Complexes of Schiff Bases A, D and E: Preparation, Identification, Analytical and Electrochemical Survey

Oriental Journal Of Chemistry ◽

10.13005/ojc/340632 ◽

2018 ◽

Vol 34 (6) ◽

pp. 2927-2941 ◽

Cited By ~ 2

Author(s):

Ali A. A. Al-Riyahee ◽

Hanaa H. Hadadd ◽

Baydaa H. Jaaz

Keyword(s):

Cyclic Voltammetry ◽

Metal Complexes ◽

Metal Ion ◽

Supporting Electrolyte ◽

Reference Electrode ◽

Spectral Studies ◽

Solubility Test ◽

Nonpolar Solvents ◽

Reversible Redox ◽

Conductance Data

A novel set of Cobalt(II), Copper(II) and Nickel(II) complexes of ligands, (E)-2-(((2,5-difluorophenyl)imino) methyl)phenol (A), (E)-2,4-dibromo-1-((2-hydroxybenzylidene) amino)anthracene-9,10-dione (D) & (Z)-1-((1-([1,1'-biphenyl]-4-yl)-2-bromoethylidene) amino)-2,4-dibromo anthracene-9,10-dione (E) were synthesized and characterized. Their structures were investigated on the basis of CHN, conductance measurements and spectral studies (H1-NMR & C13-NMR,FT-infrared and Electronic spectroscopies), cyclic voltammetry. It has observed from spectral and analytical studies that metal complexes have the composition of (ML2.X2) and one mole of ligand behaves as bidentate chelating agents around the corresponding metal ion. From solubility test, we obtained that metal complexes of ligands A, D and E had no ionic properties and dissolve partially in polar and slightly in nonpolar solvents. These results confirmed the behavior of metal complexes as weak electrolyte from their low value of molar conductivity. Conductance data and solubility test of the complexes enhanced them to be (1:2 M:L ratio). All data confirmed an octahedral geometry of these complexes and their structures as {[M (A, D or E)2(CH3COO)2], when M= Co or Ni} and {[Cu (A, D or E)2 Cl2]}. Cyclic voltammetry measurements were accomplished of Cobalt(II), Copper(II) and Nickel(II) complexes using Pt wire as counter electrode and Ag/AgNO3 as reference electrode and (Bu4N+PF6+) as supporting electrolyte. The result exhibit the irreversible process showing single one electron transfer process of Cobalt(II) and Nickel(II) complexes and unique quasi-reversible redox couple is attributed to Cu(II) complexes.

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Electrocoating Polypyrrole on Gold-Wire Electrode as Potential Mediator Membrane Candidate for Anionic Surfactant Electrode Sensor

Jurnal Kimia Sains dan Aplikasi ◽

10.14710/jksa.23.5.167-176 ◽

2020 ◽

Vol 23 (5) ◽

pp. 167-176

Author(s):

Abdul Haris Watoni ◽

Indra Noviandri ◽

Muhammad Nurdin ◽

La Ode Ahmad Nur Ramadhan

Keyword(s):

Cyclic Voltammetry ◽

Conducting Polymer ◽

Limit Of Detection ◽

Supporting Electrolyte ◽

Sodium Dodecyl ◽

Gold Wire ◽

Potential Range ◽

Wire Electrode ◽

Potential Response ◽

Potential Mediator

The development of polypyrrole as a potential mediator membrane candidate for sodium dodecyl sulfate (SDS) sensor electrode has been investigated. The polypyrrole membrane was synthesized electrochemically from the pyrrole and coated at the surface of a 1.0 mm diameter of the gold-wire electrode. Electropolymerization of pyrrole and coating of the polypyrrole produced was performed by cyclic voltammetry technique in the electrochemical cell containing supporting electrolyte of 0.01 M NaClO4 with an optimum potential range of -0.9 V–1.0 V, the scanning rate of 100 mV/s, an electric current of 2 mA, and running of potential scanning of 10 cycles. By using the similar optimal parameters of cyclic voltammetry, electropolymerization of 0.01 M pyrrole solution containing 0.001 M SDS also produces a polypyrrole membrane coated at the gold-wire electrode surface. These coated electrodes have the potential response-ability toward DS- anions in the concentration range of 10-7 M–10-5 M with a limit of detection of 10-7 M and sensitivity of electrode of 9.9 mV/decade. This finding shows that the SDS solution’s role is as supporting electrolyte and also as a source of DS- dopant during the pyrrole electropolymerization processes. Dopants are trapped in the polymer membrane during the electrochemical formation of polypyrrole and role as ionophores for DS- anion in the analyte solution. A potential response to the electrode phenomena is excellent basic scientific information for further synthesis of conducting polymer and development of conducting polymer-coated wire electrode model, especially in the construction of ion-selective electrode (ISE) for the determination of anionic surfactants with those models.

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THE DEVELOPMENT OF GLUCOSE SENSOR BASED ON SiO2-CuO MATERIALS USING SCREEN PRINTED CARBON ELECTRODE (SPCE)

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.12.1.942.50-60 ◽

2016 ◽

Vol 12 (1) ◽

pp. 50

Author(s):

Intan Frina Utamiyanti ◽

Barlah Rumhayati ◽

Ani Mulyasuryani

Keyword(s):

Cyclic Voltammetry ◽

Glucose Sensor ◽

Reference Electrode ◽

Synthesis Process ◽

Potential Range ◽

Carbon Electrode ◽

Screen Printed Carbon Electrode ◽

Cyclic Voltammetry Method ◽

Cyclic Voltammetry Analysis ◽

Screen Printed

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Fast Screening for Antioxidant Properties of Flavonoids from Pterogyne nitens Using Electrochemical Methods

Journal of AOAC International ◽

10.5740/jaoacint.11-137 ◽

2012 ◽

Vol 95 (3) ◽

pp. 773-777 ◽

Cited By ~ 1

Author(s):

Leonardo Luiz Okumura ◽

Luis Octávio Regasini Regasini ◽

Daniara Cristina Fernandes ◽

Dulce Helena Siqueira da Silva ◽

Maria Valnice Boldrin Zanoni ◽

...

Keyword(s):

Antioxidant Activities ◽

Low Cost ◽

Supporting Electrolyte ◽

Antioxidant Properties ◽

Reference Electrode ◽

Structural Features ◽

Quantitative Detection ◽

Nonaqueous Media ◽

Electrochemical Detector ◽

Fast Screening

Abstract A fast, low-cost, convenient, and especially sensitive voltammetric screening approach for the study of the antioxidant properties of isoquercitrin and pedalitin from Pterogyne nitens is suggested in this work. These flavonoids were investigated for their redox properties using cyclic voltammetry in nonaqueous media using N,N-dimethylformamide and tetrabutylammonium tetrafluorborate as the supporting electrolyte, a glassy carbon working electrode, Ag|AgCl reference electrode, and Pt bare wire counter electrode. The comparative analysis of the activity of rutin has also been carried out. Moreover, combining HPLC with an electrochemical detector allowed qualitative and quantitative detection of micromolecules (e.g., isoquercitrin and pedalitin) that showed antioxidant activities. These results were then correlated to the inhibition of β-carotene bleaching determined by TLC autographic assay and to structural features of the flavonoids.

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