[PDF] Top 20 Determination of Tannic Acid Using Silica Gel Modified Carbon Paste Electrode

... Si-gel modified CPE for the determination of quercetin in term of the trend ...that using activated Si-gel by ...Si- gel may be caused by the reduced of conductivity resulted ... See full document

... Chemical modified electrodes (CME) have been largely used in the area of electrochemical and biological fields ...the determination of DA and EP using CME, however, many of these works have been ... See full document

... DA determination is the resolution between DA and coexisting species such as uric acid (UA) and ascorbic acid ...UA determination is of great importance in reality ...the electrode, ... See full document

... simultaneous determination of PHZ and HZ. The modified electrode exhibits highly electrocatalytic activity for the oxidation of PHZ and HZ associated with negative shifts in anodic peak ...this ... See full document

... Fig .7 showed the cyclic voltagrams for solution containing mixture of both 1X10 -3 M AA and 1X10 -4 M DA and 0.5X10 -3 M UA in phosphate buffer solution of pH 7.4. The bare CPE (dashed line) showed only one broad and ... See full document

... chemically modified carbon nanotubes paste electrode by incorporation of ferrocenedicarboxylic acid as a suitable electrochemical sensor for sulfite determination at trace ...the ... See full document

... lactic acid was studied on the unmodified and CoPC modified CPE in the ...lactic acid in pH 2 phosphate buffer on the modified and unmodified CPE using a scan rate of 100 mV s -1 ... See full document

... performed using a BHP 2063 + Electrochemical Analysis System, Behpajooh, Iran ...FA, carbon nanotubes, graphite powder, paraffin oil and reagents were analytical grade from ...phosphoric acid and its ... See full document

... the determination of each species using ...The determination of AA in pharmaceutical preparations was carried out by the standard addition method in order to prevent of any matrix ... See full document

... ascorbic acid (AA) by square wave voltammetry has been per- formed at a modified carbon paste electrode with macrocyclic ligand 1,4,8,11-tetraazacyclotetradecane (cy- clam) and ... See full document

... and then, sharply decreases by increasing of pH. A negative shift in the peak potential of the boron- ARS complex was observed with increase in pH. No significant signal related to the oxidation of ARS in the complex was ... See full document

... oxalic acid has also been investigated ...glassy carbon (GCE) electrode and traditionally carbon paste electrodes (CPE) suffers from sluggish electron transfer kinetics and large ... See full document

... chemically modified electrodes is that in which immobilized redox mediators are used to make possible the charge-transfer between the electrode and analyte in solution at much lower potentials than ... See full document

... Results showed that there were linear relationships between the oxidation peak currents and the DCF concentration in two different linear ranges of 0.1-100.0 µM (Ipa = 0.0622 C (µM) + 3.5613) and 100.0-500.0 µM (Ipa = ... See full document

... chemically modified electrodes to detect DA selectively has occurred in past ...polymer-modified electrode [16-25], carbon ionic liquid electrodes [26-28], nano materials modified ... See full document

... Abstract Carbon Paste Electrode Modified by silica gel /MWCNTs was manufactured and used for the electrochemical determination of Ascorbic acid (AA) in acetate ... See full document

... simultaneous determination of dopamine in presence of ascorbic acid at electropolymer modified carbon paste electrode ...red) modified electrode for ... See full document

... Ascorbic acid (AA), uric acid (UA), sodium dodecyl sulphate (SDS), tween 80 and cetyltrimethylammonium bromide (CTAB) were purchased from ...phosphoric acid, 0.04 M acetic acid and ... See full document

... Liquid-state-contact based sensors are credible to substitute by Solid-state-contact based sensors and improve sensors of the next-generation. Even though 30 years ago a solid-state-contact based sensor was described, ... See full document

... alternative electrode materials including solid electrodes has shown innumerous performance for stripping ...working electrode such as gold, platinum and carbon. In particular, carbon ... See full document