نتایج جستجو برای: Differential pulse voltammetry

تعداد نتایج: 377660  

Journal: :iranian journal of pharmaceutical research 0
alptug atila department of analytical chemistry, faculty of pharmacy, ataturk university, 25240, erzurum, turkey bilal yilmaz department of analytical chemistry, faculty of pharmacy, ataturk university, 25240, erzurum, turkey

in this study, simple, fast and reliable cyclic voltammetry (cv), linear sweep voltammetry (lsv), square wave voltammetry (swv) and differential pulse voltammetry (dpv) methods were developed and validated for determination of bosentan in pharmaceutical preparations. the proposed methods were based on electrochemical oxidation of bosentan at platinum electrode in acetonitrile solution containin...

Journal: :journal of the iranian chemical research 0
ali niazi department of chemistry, faculty of science, islamic azad university – arak branch, arak, iran roya tajik department of chemistry, faculty of science, islamic azad university – arak branch, arak, iran samira kamel foladi department of chemistry, faculty of science, islamic azad university – arak branch, arak, iran

lead forms the complexes with xylenol orange in the basic solution. an adsorptivedifferential pulse stripping method for the determination of lead is proposed. the procedureinvolves an adsorptive accumulation of lead on a hanging mercury drop electrode (hmde) inthe presence of xylenol orange, followed by reduction of adsorbed lead by voltammetric scanusing differential pulse modulation. the opt...

Journal: :international journal of environmental research 0
h. hoveidi graduate faculty of environment, university of tehran, tehran, iran h. sid kalal nfcrs, nuclear science and technology research institute, aeoi, p.o. box 11365-3486, tehran, iran g. nabi bidhendi graduate faculty of environment, university of tehran, tehran, iran h. rashedi biotechnology group school of chemical engineering college of engineering, university of tehran p.o.box:11155-4563,tehran, iran d. vafaei mehr university of tehran, aras international campus, aras, iran

furan is a possible human carcinogen in many types of foods. a new and sensitive electroanalytical method for determination of furan has been developed and validated. the best condition forelectrochemical response was obtained with 0.1 m britton-rabinson buffer solution (ph=5) a glassy carbonelectrode (gce) was used as the working electrode, a ag/agcl/ kcl(sat.) electrode served as the referenc...

Journal: :journal of reports in pharmaceutical sciences 0
mohammad bagher majnooni mohammad bagher gholivand mehdi khodadadian nazanin-sadat afnanzade gholamreza bahrami

the adsorptive behavior of the immunosuppressive agent tacrolimus was studied by cyclic and differential-pulse voltammetry on a hanging mercury drop electrode (hmde). the drug was accumulated at hmde and two well-defined peak currents were obtained at -1353 and -1417 mv vs . sce (saturated kcl) in borate buffer (ph 10.0) + 0.1 kcl solution. a voltammetric procedure was developed for the determi...

Ali Akbar Moghadamnia Atieh Zabihollahpoor, Ghasem Najafpour-Darzi Mostafa Rahimnejad,

Herein, gold nanoparticle had been successfully synthesized through a simple, inexpensive and clean electrochemical technique. Gold nanoparticles were directly deposited on the electrode surface using an electrochemical strategy. Then, the electrochemical deposition parameters (such as applied potential and deposition time) were optimized. 1.1 V and 250 s were applied as the optimal electrodepo...

2015
Aurelia Magdalena Pisoschi

There are various ways to impose a potential variation in time, and subsequently a series of voltammetric methods. Cyclic voltammetry relies on linearly scanning the potential in time, observing a triangular waveform variation [1-3]. Differential pulse voltammetry is based on two samplings of the current intensity for each potential pulse: one measurement before applying the pulse, and the seco...

Journal: :international journal of environmental research 2013
h. hoveidi h. sid kalal g. nabi bidhendi h. rashedi d. vafaei mehr

furan is a possible human carcinogen in many types of foods. a new and sensitive electroanalytical method for determination of furan has been developed and validated. the best condition forelectrochemical response was obtained with 0.1 m britton-rabinson buffer solution (ph=5) a glassy carbonelectrode (gce) was used as the working electrode, a ag/agcl/ kcl(sat.) electrode served as the referenc...

Boniface jeyaraj Chinnapan Jayakumar Chinnapan Maria Magdalane Kasinathan Kanimozhi Kasinathan Kaviyarasu

A selective electrochemical method for the determination of uric acid was developed by using nano poly cresol red modified glassy carbon electrode. This new material has been characterized by Scanning Electron Microscopy, cyclic voltammetry and Differential pulse voltammetry. This modified electrode shows excellent electrocatalytic activity towards the oxidation of uric acid in the presence of ...

Alireza Khoshroo Mehdi Maleki Mohammad Mazloum-Ardakani,

In the present paper, the electrochemical properties of magnetic iron oxide nanoparticles (Fe2O3 and Fe3O4) as highly sensitive sensors for the simultaneous determination of hydrazine and hydroxylamine was described. The electrochemical behavior of hydrazine and hydroxylamine was investigated using cyclic voltammetry, chronoamperometry and differentia...

2015
Enda Howard John F. Cassidy John O'Gorman

This communication characterises the differential pulse voltammetric response of ultramicroelectrodes in connection with two different models.

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