Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Effect of Procedure Time on Microstructure and Corrosion Behavior of ZrTiO4/ZrO2 Nanocomposite Coatings by Plasma Electrolytic Oxidation (PEO) Applied on the Ti-6Al-4V Substrate74776543200ENElham NikoomanzariDepartment of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, IranKazem BabaeiDepartment of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, IranArash Fattah-alhosseiniDepartment of Materials Engineering, Bu-Ali Sina University, Hamedan 65178-38695, IranJournal Article20200506In this research, the effect of PEO procedure time on the distinct properties of coatings such as morphology, chemical composition, roughness and corrosion has been studied. A scanning electron microscopy equipped with an energy dispersive spectroscopy was used to study the microstructure of the coatings. In addition, x-ray diffraction (XRD) and roughness meter were used to evaluate the chemical composition and roughness of the coatings, respectively. The corrosion properties of coatings have been also studied by polarization and electrochemical impedance experiments in the Hank's physiological solution. The results of microstructural analysis showed that rising the time of the coating procedure resulted in an increase in the size of porosity, thickness and roughness. The results of the XRD pattern showed that all coatings were composed of two phases of zirconia and zirconium titanate and that the change in time of coating did not alter the chemical composition of the coating. In the case of corrosion resistance of coatings, the most corrosion potential (611 mV) with the least corrosion current density (18.50 nA/cm<sup>2</sup>) in the coating created at the end of the third step of coating (10 minutes) resulted in the most corrosion resistance (0.602 MΩ.cm<sup>2</sup>).https://www.abechem.com/article_43200_8cf8cfbe40d97bbd85204822e6b27c14.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Multistep Surface Electrode Mechanism Coupled with Preceding Chemical Reaction-Theoretical Analysis in Square-Wave Voltammetry76677943201ENMilkica JanevaFaculty of Medical Sciences, “Goce Delcev” University, Stip, MacedoniaPavlinka KokoskarovaFaculty of Medical Sciences, “Goce Delcev” University, Stip, MacedoniaRubin GulaboskiFaculty of Medical Sciences, “Goce Delcev” University, Stip, MacedoniaJournal Article20200515In this theoretical work, we present for the first time voltammetric results of a surface multistep electron transfer mechanism that is associated with a preceding chemical reaction that is linked to the first electron transfer step. The mathematical model of this so-called “surface CEE mechanism” is solved under conditions of square-wave voltammetry. We present relevant set of results portraying the influence of kinetics and thermodynamics of chemical step to the features of simulated voltammograms. In respect to the potential difference at which both electrode processes occur, we consider two different situations. In the first scenario, both peaks are separated for at least |150 mV|, while in the second case both peaks occur at same potential. Under conditions when both peaks are separated for at least |150 mV|, the first process can be described with the voltammetric features of a surface CE mechanism, while the second peak gets attributes of a simple surface electrode reaction. When both peaks take place at same potential, we elaborate an elegant methodology to achieve separation of both overlapped peaks. This can be done by modifying the concentration of the substrate “Y” in electrochemical cell that is involved in the preceding chemical reaction. The results of this work can be of big assistance to experimentalists working in the field of voltammetry of metal complexes and drug-drug interactions.
https://www.abechem.com/article_43201_ed457bcca0c109c9500ce30f7043ab71.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Platinum Nanoparticle Electrode Modified Iodine using Cyclic Voltammetry and Chronoamperometry for Determination of Ascorbic Acid78079243202ENAhmad KhalafAlkhawaldehThe University of Jordan, Department of Chemistry, Amman - 11942, Jordanorcid.org/0000-0003-4348-6613Journal Article20200411This study investigated the oxidation of ascorbic acid (Vitamin C) using a platinum nanoparticle electrode coated with an iodine monolayer, called a modified electrode. The electrode were grown using the cyclic voltammetry technique and the electrochemical measurements were taken using the cyclic voltammetry and chronoamperometric technique. In the case of platinum nanoparticle electrode modified iodine by and ascorbic acid, the analyzed the anodic peak current and anodic maximum potential is done. The also examined the effect of the concentration of ascorbic acid and the effect of the scan rate on anodic top parameters. The results show that the anodic current peak increases and that the anodic peak potentials increase in comparison to the clean electrode to a negative value. Anodic peak current increases with scan rate of ascorbic acid increases. As the ascorbic acid concentration and scan rate increase, the anodic peak potential changes to more positive values. The SEM and EDX demonstrate some fascinating characteristics of the uniform particle distribution, growth and self-assembly of the iodin-modified platinum nanoparticle. The sensor was ascorbic acid with a sensitivity of 0.215 μA/μM-cm<sup>2</sup> and a detection limit of 0.01 μM (R<sup>2</sup>=0.994).The results show that the iodine-modified platinum nanoparticle electrode developed can be used in food sampling to voltammetric determine Vitamin C.https://www.abechem.com/article_43202_0f1c03b5be73dbc020124959c86e8133.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Green Potentiometric Method for Determination of Triprolidine Hydrochloride and Pseudoephedrine Hydrochloride in their Different Pharmaceutical Matrices using Liquid and Solid Contact Gold Electrodes79380943203ENYasmine Farouk BassuoniAnalytical Chemistry Department, Faculty of Pharmacy, MTI University, El Hadaba El Wosta, Mokattam 5th District, Cairo, EgyptHebatallah EssamAnalytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, EgyptEman Saad ElzanfalyAnalytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, EgyptHala El-SayedZaazaaAnalytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, EgyptKhadiga Mohamed KelaniAnalytical Chemistry Department, Faculty of Pharmacy, MTI University, El Hadaba El Wosta, Mokattam 5th District, Cairo, EgyptAnalytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, EgyptJournal Article20200417Factors affecting the performance of polyvinyl chloride based ion selective electrode such as using different cationic exchangers and ionophores as well as sensor fabrication procedures were recently the scope of study by several researchers. This work presents an environment friendly electro-analytical method for the determination of Triprolidine HCl (TRI) and Pseudoephedrine HCl (PSE). A comparative study was held between five suggested sensors for each drug to reach optimum response. They were developed using several exchangers as tetraphenylborate (TPB), phosphotungestate (PT) and tetrakis with different ionophores as β-cyclodextrin (β-CD) and calixarene using nitrophenyl octyl ether (NPOE) as a plasticizer. Also different strategies were applied for their membrane fabrication. Conventional sensors (3a and 3b) and solid contact gold sensors (a and b) showed the best sensitivity as well as the fastest response for determination of TRI and PSE, respectively .The two conventional sensors were composed of (PVC/TPB/β-CD/NPOE) and (PVC/PT/calixarene/NPOE) in addition to the solid contact gold sensors were composed of (TPB/β-CD/NPOE) and (PT/calixarene/NPOE). Moreover those sensors succeeded to determine TRI and PSE in their different pharmaceutical formulations. Method validation was assessed according to IUPAC recommendations. The method is considered to be a green eco-friendly technique that neither requires sample pre-treatment nor derivatizationhttps://www.abechem.com/article_43203_f246d7318426956ebd038e38c70168e0.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Simultaneous Determination of Hg(II), Cd(II), Pb(II) and Zn(II) by Anodic Stripping Voltammetry using Modified Carbon Paste Ionic Liquid Electrode81082743204ENAshkan FaridanDepartment of Analytical Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, IranManochehr BahmaeiDepartment of Analytical Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, IranAmirabdolah Mehrdad SharifDepartment of Analytical Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, IranJournal Article20200701In the presented study, CuO-CoO-MnO/SiO<sub>2</sub> nanocomposite was synthesis by Cu(II), Co(II), Mn(II), with 1:1:1 mole ratio and Tetraethyl orthosilicate. azo–azomethine 1-(3-imino-4-hydroxophenylazo-4-nitrobenzene)-4-methyl phenol (L) was synthesized and used as a ligand for capturing the metal ions. Also, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide was applied as the ionic liquid in order to increase the conductivity of the electrode. The nanomaterials were investigated using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM); SEM image shows a homogeneous CuO-CoO-MnO/SiO<sub>2</sub> nanocomposite, with an average particle size distribution of 40 nm. Also, the electrochemical characterization of L/CuO-CoO-MnO/SiO<sub>2</sub>/IL/CPE was checked by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. The modification of carbon paste electrode applied to determination of some heavy metal ions include Hg(II), Cd(II), Pb(II) and Zn(II) by square wave anodic stripping voltammetry (SWASV), for the first time. The linear range for determination of analytes in optimized condition was obtained as Hg: 0.0007-0.21 and 0.21-27 μM, Cd: 0.0007-0.21 and 0.21-27 μM, Pb: 0.0009-0.23 and 0.23-27 μM, Zn: 0.001-0.25 and 0.25-27 μM. Also, the detection limits for Hg(II), Cd(II), Pb(II) and Zn(II) were calculated to be 3.019×10<sup>-4</sup>, 3.445×10<sup>-4</sup>, 2.407×10<sup>-4</sup> and 5.134×10<sup>-4</sup> μM, respectively. Finally, the sensor was successfully used for the measurement of the analytes in Tap water and River water samples with recoveries ranging between 98.1% and 102.7%. Also, the obtained results accorded very well with those obtained by atomic absorption spectroscopy (AAS) that corroborated the accuracy and validity of the proposed method.https://www.abechem.com/article_43204_1311f9fb81606169321c99db12ed88fb.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Effect of Dates Extracts as Environmentally Friendly Corrosion Inhibitor for Carbon Steel in 1M HCl Solution82884043205ENHanane BoubekraouiLaboratory of Engineering and Applied Technologies, School of Technology, Beni Mellal, MoroccoIssam FORSALLaboratory of Engineering and Applied Technologies, School of Technology, Beni Mellal, Morocco0000-0003-2769-8499Hamza OuradiLaboratory of Bioprocess and Biointerface, University Sultan Moulay Slimane, Faculty of Sciences and Technologies, BeniMellal, MoroccoYassine ElkhotfiLaboratory of Engineering and Applied Technologies, School of Technology, Beni Mellal, MoroccoHafida HaninLaboratory of Bioprocess and Biointerface, University Sultan Moulay Slimane, Faculty of Sciences and Technologies, BeniMellal, MoroccoJournal Article20200509Inhibitory effect of extracts from three date varieties namely khalt (kha), Lassiane (La) and Tadmamt (Td)), and the mixture of date varieties as environmentally friendly corrosion inhibitor for carbon steel in 1M HCl is studied by means of electrochemical tests such as electrochemical impedance spectroscopy (EIS), and Tafel polarization. It's been obtained that in 1.0 M HCl solution the date extracts are a new green corrosion inhibitor for carbon steel. The results found show that with increasing concentration of the date extracts the values of inhibition efficiency increased. Comparison of the experimental results of the three varieties and the extract mixture of dates, exhibited that inhibition efficiency increased in order Kha, La, Td and the mixture. Therefore, the extract mixture is the best inhibitor with a maximum inhibitory efficacy value reaching 91% at a concentration of 1% of the mixture. Polarization study revealed that dates extracts acted as a mixed inhibitor, with more principally cathodic process. The compounds of the date extracts are adsorbed on the metal surface forming the protective film, which explains the inhibitory action of these extracts, this result is confirmed by electron scanning microscopy (SEM).
https://www.abechem.com/article_43205_708d52b621613dfee8177c8b1d97315f.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Essential Oil of Aaronsohnia Pubescens Subsp. Pubescens as Novel Eco-Friendly Inhibitor for Mild Steel in 1.0 M HCl84185643206ENMounir ManssouriMoulay Ismail University of Meknes, Laboratory of Natural Substances & Synthesis and Molecular Dynamics, Faculty of Sciences and Techniques, P.B 509, 52000, Errachidia, Moroccohttps://orcid.org/00Mohamed ZniniMoulay Ismail University of Meknes, Laboratory of Natural Substances & Synthesis and Molecular Dynamics, Faculty of Sciences and Techniques, P.B 509, 52000, Errachidia, Moroccohttp://orcid.org/000Yassir El OuadiLaboratory of Analytical Chemistry, Materials, and Environment (LC2AME), Faculty of Sciences, University of Mohammed Premier, B.P. 717, 60000 Oujda, MoroccoAbdeslam AnsariMoulay Ismail University of Meknes, Laboratory of Natural Substances & Synthesis and Molecular Dynamics, Faculty of Sciences and Techniques, P.B 509, 52000, Errachidia, MoroccoJean CostaUniversity of Corsica, CNRS-UMR 6134, Laboratory of Chemistry of Natural Products, BP 52, 20250 Corti, FranceLhou MajidiMoulay Ismail University of Meknes, Laboratory of Natural Substances & Synthesis and Molecular Dynamics, Faculty of Sciences and Techniques, P.B 509, 52000, Errachidia, MoroccoJournal Article20200521The essential oil from the aerial parts of Aaronsohnia pubescens subsp. pubescens plant (APS oil) was extracted by hydrodistillation, and then its composition was analyzed by gas chromatography (GC) and GC-mass spectrometry (GC/MS). We identified thirty-four constituents presenting 87% of the total amount, Which, Carvacrol (13.9%), α-Pinene (10.3 %), E-Anethole (10.1%) and Ar-Turmerone (9.3%) were identified as major constituents of APS oil. The corrosion inhibition and adsorption (CIA) performance of the APS oil on the corrosion mild steel (MS) in 1M hydrochloric acid was evaluated by the weight loss (WL) analysis and electrochemical assays. The weight loss outcomes indicate that APS oil shows a worthy inhibitory efficiency of 89.88 % which reached at 3g.L<sup>-1</sup> and 343 K. The charge transfer process mainly controls the results of EIS measurements, PDP measurements showed that the studied APS oil performs as a mixed-type inhibitor. Furthermore, the adsorption on the MS surface follows the Langmuir model.https://www.abechem.com/article_43206_25168098d11a2d35e2dbcb7c9d6ed9d0.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Voltammetric Determination of α-Lipoic Acid using Poly(Vanillin) Modified Platinum Electrode85786943207ENSerap Titretir DuranChemistry Department, Arts and Sciences Faculty, İnönü University, 44280, Malatya-Turkey0000-0001-8361-9818Chedia Ben Ali HassineElectrical and Electronics Engineering Department,Engineering Faculty, Özyegin University, İstanbul-TurkeyMuammer BurçChemistry Department, Arts and Sciences Faculty, İnönü University, 44280, Malatya-Turkey0000-0002-9507-7283Öznur GüngörChemistry Department, Arts and Sciences Faculty, İnönü University, 44280, Malatya-Turkey0000-0002-0664-1218Journal Article20200503In the present study electrochemical detection of α-lipoic acid (α-LA) was carried out with a poly(Vanillin) modified platinum electrode p(VA)/PtE in Brinton Robinson buffer (BR) solution. The platinum electrode surface’s was modified with cyclic voltammetry method. The prepared Pt electrode was characterized by cyclic voltammetry in ferrocyanide and scanning electron microscopy (SEM) images. The number of cycles and scan rate effects were studied using square wave voltammetry (SWV) in BR buffer containing 1 mM α-LA. The electrochemical oxidation of α-lipoic acid on the modified Pt electrode is influenced by the pH and it is an irreversible reaction in which one electron and one proton are transferred. Electrolyte type and pH effect were studied. The anodic peak current shows a linear increase with α-LA concentrations ranging from 0.03 mM to 2.00 mM at pH 5, the detection limit being of 0.025 mM. The α-lipoic acid quantification in synthetic urine samples was made by SWV with the modified Pt electrode.https://www.abechem.com/article_43207_b6ef19a7b9b3ac05773eb613afb99ed2.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Ag/Pt Core-Shell Nanoparticles on Graphene Nanocomposite for Effective Anodic Fuels Electro-oxidation87088043208ENLaleh HosseinzadehDepartment of Chemistry, Dehloran Branch, Islamic Azad University, Dehloran, IranMohammad Mazloum-ArdakaniDepartment of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, IranJournal Article20191216The nanocomposite consists of the Ag as a core and Pt as shell on the surface of graphene nanosheets (Ag/Pt-G) was synthesized with a simple method and used as a novel electrochemical platform for an efficient catalyst for oxidation of the ethanol, methanol and formic acid. The morphology and electrochemical properties of Ag/Pt-G nanocomposite were investigated by TEM, X-ray diffraction, and voltammetric methods. Based on experimental results, Ag/Pt-G nanocomposite shows high performance toward oxidation of formic acid, ethanol, and methanol, due to the synergistic effect of Pt, Ag, and graphene nanosheets. The presence of Ag in the structure of nanocomposite leads to enhancing the usage of Pt in the core-shell structure. The proposed nanocomposite with good stability and high catalytic activity can be applied as an effective catalyst.https://www.abechem.com/article_43208_3ec413cf7fb9f90ecd208d20e6a90de5.pdfAnalytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of TehranAnalytical and Bioanalytical Electrochemistry-12620200601Determination of Copper Content of Human Blood Plasma by an Ion Selective Electrode based on a New Copper-Selectophore88189243211ENFarnoush FaridbodCenter of Excellence in Electrochemistry, School of Chemistry, University of Tehran, Tehran,
Iran0000-0003-1364-4318Mina BahmanCenter of Excellence in Electrochemistry, School of Chemistry, University of Tehran, Tehran,
IranJournal Article20200120A new selectophore was introduced for Cu<sup>2+</sup> ions. Spectroscopic studies showed a selectivity of a new organic compound (L) toward copper ions and several transitional metal ions. Hence, L was utilized in designing several ion selective electrodes for these cations. In practice, Cu<sup>2+</sup> ion selective electrode behaved Nernstian (slope of 27.95±0.3 mV decade<sup>-1</sup>) over a wide linear range of 1.0×10<sup>-6</sup>-1.0×10<sup>-2</sup> mol L<sup>-1</sup>. Optimum performance of the indicator electrode was observed by a membrane containing 7% selectophore, 2% sodium tetraphenyl borate (NaTPB) as an ionic additive, 61% nitrobenzene (NB) as solvent mediator and 30% polyvinyl chloride (PVC). The sensor showed a short response time of about 20 s and an acceptable life time, the potentiometric response is independent on the pH of the solution in the range of 3.5-7. The optimized copper sensor was used for analysis of copper content of some blood plasma samples. The obtained results were in good agreements with ICP-OES method.https://www.abechem.com/article_43211_e049542f179031c8e94b9998e5a43f14.pdf