[PDF] Top 20 Direct Simultaneous Electrochemical Determination of Hydroquinone and Catechol at a Poly(glutamic acid) Modified Glassy Carbon Electrode

... 440 electrochemical analyzer (CH Instruments, Chenhua ...calomel electrode (SCE) as reference electrode, a platinum wire counter electrode and a bare or modified glassy ... See full document

... of poly-L- glutamic acid (PGA) as model of polyaminoacids could be an ideal system, due its biological and chemical properties ...different electrochemical sensor previously applied for ... See full document

... or carbon electrodes ...from electrochemical point of view ...by electrode surface makes the relationship between the voltammetric response and the isomers concentrations, in the mixtures, non-linear ... See full document

... 800 electrochemical analyzer (Shanghai Chenhua Instrument Company, China) was used to perform elec- trode characterization and voltammetric ...calomel electrode (SCE) as the reference electrode, a ... See full document

... Among carbon materials, graphene quantum dots (GQDs) are graphene nanosheets with a three- dimensional scale of less than 100 nanometers, and they have also been studied recently for new types of carbon ... See full document

... and catechol (CC) are two isomers of ...the determination of HQ and CC are commonly performed after pretreatment and separation ...of simultaneous determination without previous separations of ... See full document

... simultaneously determination of HQ and CC with high sensitivity and good ...(chemical modified electrode) are reported in the ...pervasive electrode in electrochemical sensing of ... See full document

... the electrochemical response was consistent with that of ...the electrochemical process, which was probably caused by the synergistic effect of the electro-catalytic property of EY and ...film ... See full document

... Simultaneous determination of dopamine (DA), ascorbic acid (AA) and uric acid (UA) has received a considerable attention [26] and plays a vital role in the process of metabolism ...for ... See full document

... of electrode surface by the products generated from electrochemical reactions; consequently, the achieved detection limits are relatively ...different modified electrodes have been proposed ... See full document

... their simultaneous determination ...and electrochemical methods [1, 2, 4, 8]. Electrochemical methods showed superior advantages compared to other methods like sensitivity, high efficiency, ... See full document

... of carbon paste electrode (CPE) and showed good electrocatalytic activity towards the oxidation AA and DA compared with the bare CPE ...covalently modified glassy carbon ... See full document

... To simultaneously determine the isomers of dihydroxybenzene, many materials have been used to modify the electrode. Graphene is a new carbonaceous material composed of a two-dimensional honeycomb lattice ... See full document

... with electrochemical anodization at a constant potential of ...3-thiophenemalonic acid for 10 ...3-thiophenemalonic acid molecules were gradually electropolymerized onto the GCE ... See full document

... 660D Electrochemical Workstation (Shanghai CH Instruments, ...working electrode was a bare, a pretreated or Poly(acid chrome blue K) modified GCE ...auxiliary electrode was a ... See full document

... strong acid environment could prevent the reaction of VC with DMF/carboxyl/MWCNTs on the modified electrode and the activity of film enhanced with acidity ...of electrode had more negative ... See full document

... the carbon paste electrode. The MWCNTs modified electrode was left to dry naturally at room temperature to form MWCNTs ...the electrode was immersed in PBS (pH ...sulfosalicylic ... See full document

... of electrode surfaces has been an important research area in ...other electrode concepts in electrochemistry, the distinguishing feature of a chemically modified electrode is that generally a ... See full document

... In order to find the optimum conditions (highest sensitivity) for Pb (II) determination using GCE-L, the influence of various parameters, like concentration of (L), tacc, and Eacc on peak current were studied. ... See full document

... in carbon paste electrodes due to their interesting properties, such as high electron transfer ability, electrocatalytic activity, high surface area, the cheap and ease of their construction, low toxicity, high ... See full document