نتایج جستجو برای: voltammetric determination

تعداد نتایج: 252995  

Journal: :physical chemistry and electrochemistry 0

the electrochemical behavior of a modified carbon paste electrode (mcpe) with n,n′ethylenbis(salicylideneiminato)copper(ii) complex ([cu(ii)-salen]) was investigated as a newsensor for cystein. the britton-robinson buffer with ph 5, 10% modifier in electrode, potentialscanning rate of 20 mvs-1 and puls height of 50 mv were used as the optimum condition for thedetermination of cysteine using car...

2015
Haitao Han Dawei Pan Dongyan Liu Xueping Hu Mingyue Lin Fei Li

Citation: Han H, Pan D, Liu D, Hu X, Lin M and Li F (2015) Cathodic stripping voltammetric determination of chromium in coastal waters on cubic Nano-titanium carbide loaded gold nanoparticles modified electrode. Front. Mar. Sci. 2:75. doi: 10.3389/fmars.2015.00075 Cathodic stripping voltammetric determination of chromium in coastal waters on cubic Nano-titanium carbide loaded gold nanoparticles...

Journal: :analytical and bioanalytical chemistry research 0
karim asadpour-zeynali department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran venus baghalabadi department of analytical chemistry, faculty of chemistry, university of tabriz, tabriz, iran

in this work poly eriochrome black t (ebt) was electrochemically synthesized on the glassy carbon electrode as electrode modifier. on the modified electrode, voltammetric behavior of isoniazid (inh) was investigated. the poly (ebt)-modified glassy carbon electrode has excellent electrocatalytic ability for the electrooxidation of isoniazid. this fact was appeared as a reduced overpotential of i...

2007
Vahid Nasiri Hassan Karimi-Maleh Mohammad A. Khalilzadeh Daryoush Zareyee

In this work, we study electrochemical behavior of p-chloranil as a suitable mediator for voltammetric determination of dopamine (DA) using voltammetric method. Using the modified electrode, the kinetics of DA electrooxidation was considerably enhanced by lowering the anodic over potential through a catalytic fashion. The differential voltammetric peak currents of the electrode increased linear...

Journal: :analytical and bioanalytical chemistry research 0
ramin m.a.tehrani department of chemistry, yadegar imam khomeini (rah), islamic azad university hanieh ghadimi department of chemistry, faculty of science, university of malaya, 50603 kualalumpur, malaysia. department of chemistry, the university of akron, akron, oh 44325-3601, usa

this study demonstrates the use of a selective and sensitive voltammetric sensor for determination of acetaminophen (ac). this was  performed by modifying a glassy carbon electrode with composite film of poly(4-vinylpyridine) and graphene sheet (p4vp/gr-gce). the redox peak currents of ac increased significantly at p4vp/gr-gce. the result was achieved by the synergistic effect of combined elect...

Journal: :Acta chimica Slovenica 2011
Lenka Bandžuchová Renáta Selešovská

The electrochemical behavior of folic acid (FA) on a polished silver solid amalgam electrode (p-AgSAE), as a liquid mercury free electrode, has been studied in this paper. Differential pulse voltammetry (DPV) was found as a suitable method for voltammetric determination of folic acid. A limit of detection as 5.88 × 10-10 M (after 60 s of accumulation) was calculated for FA determination in an a...

Journal: :The Journal of Automatic Chemistry 1989
H. H. J. L. Ploegmakers P. A. Moritz P. J. M. M. Toll W. J. van Oort

A computerized electrochemical detection system for application after HPLC, provided with a cyclic voltammetric oxidative and reductive module, is described for the on-line qualitative determination of electroactive antineoplastic agents and metabolites in urine samples, collected from cancer patients, following intravenous administration.The application of two cyclic voltammetric detection mod...

Journal: :The Analyst 1988
C E Lunte J F Wheeler W R Heineman

A voltammetric-amperometric detector for liquid chromatography based on a dual electrode electrochem-ical cell has been developed. This detector enables voltammograms to be obtained without the charging current problems inherent in single electrode voltammetric detectors. The detector is operated by scanning the potential of the upstream (voltammetric) electrode and detecting the electrolysis p...

2006
M. K. Pawlak

The adsorptive stripping differential pulse voltammetric method was proposed for the determination of fenitrothion [O,O-dimethyl O-(4-nitro-m-tolyl)phosphorothioate]. The voltammetric response was evaluated in 0,04 mol l-1 Britton-Robinson buffer with respect to the accumulation time and potential, and concentration dependence. The relationship between peak current and fenitrothion concentratio...

2014
Matěj Velický Andrew N.J. Rodgers Robert A.W. Dryfe Kin Tam

In this review, we will briefly outline the voltammetric investigations of the transfer of ionisable drugs at the interface between two immiscible electrolyte solutions. The voltammetric techniques enable the determination of some key in vitro properties of ionisable drugs, including partition coefficient, diffusion coefficient and membrane permeability. Some successful applications will be hig...

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