Determination of Cyanuric Acid by Electrochemical Cyclic Voltammetry Method Using CuGeO3 Nanowires as Modified Electrode Materials

2013 ◽  
Vol 4 (3) ◽  
Author(s):  
L. Z. Pei ◽  
Y. K. Xie ◽  
Y. Q. Pei ◽  
Z. Y. Cai ◽  
C. G. Fan
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrochemical Method ◽  
Electrode Materials ◽  
Cyanuric Acid ◽  
Cyclic Voltammogram ◽  
Carbon Electrode ◽  
Scan Rate ◽  
Cyclic Voltammetry Method

A simple electrochemical method for the determination of cyanuric acid (CA) has been developed based on a CuGeO3 nanowire modified glassy carbon electrode. The dense CuGeO3 nanowire film can be formed on the surface of the glassy carbon electrode. The roles of scan rate, CA concentration, and electrolytes with different pH values on the electrochemical responses of CA have also been analyzed. The intensities of two anodic peaks vary linearly with the increase of the scan rate from 25 to 200 mVs−1. The intensity of the electrochemical CV peak increases with the increase of the acidity of the electrolytes. The two anodic peak currents are linear with the CA concentration in the range of 0.005–2 mM. The linear correlation coefficient is 0.984 and 0.980 for the cyclic voltammogram peaks (cvp) cvp1 and cvp2, respectively. The detection limit is 4.3 μM and 2.1 μM for cvp1 and cvp2, respectively. The proposed electrochemical method is convenient and effective sensing of CA.

Determination of isoniazid content via cysteic acid/graphene modified glassy carbon electrode

2015 ◽  
Vol 7 (2) ◽  
pp. 793-798 ◽  
Author(s):  
Xiaojing Si ◽  
Lin Jiang ◽  
Xinyue Wang ◽  
Yaping Ding ◽  
Liqiang Luo
Keyword(s):  
Detection Limit ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrochemical Method ◽  
Cysteic Acid ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode

The electrodeposited graphene (EGR) and cysteic acid (CA) composite (CA/EGR) was fabricated through an electrochemical method for the modification of glassy carbon electrode (GCE). The obtained detection linearity of isoniazid at the CA/EGR/GCE ranged from 0.1 to 200 μM with the detection limit of 0.03 μM (S/N = 3).

scholarly journals DEVELOPMENT OF A SENSOR BY ELECTRO-POLYMERIZATION OF ERICHROME BLACK-T ON GLASSY CARBON ELECTRODE AND DETERMINATION OF AN ANTI-INFLAMMATORY DRUG DICLOFENAC

2018 ◽  
pp. 81-87
Author(s):  
Rohini M. Hanabaratti ◽  
Jayant I. Gowda ◽  
Suresh M. Tuwar
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Pharmaceutical Dosage Form ◽  
Inflammatory Drug ◽  
Voltammetric Detection ◽  
Scan Rate ◽  
Electro Oxidation ◽  
Anti Inflammatory

Objective: The aim of this study was to develop a simple, reliable voltammetric method and its validation for determination of nonsteroidal anti-inflammatory drug diclofenac (DFC). Methods: The proposed method was based on electro-oxidation of DFC at poly (erichrome black T) modified glassy carbon electrode (PEBT/GCE) in 0.2 M phosphate buffer solution of pH 7.0. Cyclic voltammetry and differential pulse voltammetric techniques were employed to study electro-oxidation behavior. Under the optimal conditions, variations of EBT concentration, effect of pH, scan rate on the oxidation of DFC was studied. Results: A well-defined oxidation peak at about +0.59 V vs. standard calomel electrode was observed for voltammetric detection of DFC. pH effect shows the participation of an equal number of protons and electrons in the mechanism. The relation between a logarithm of peak current with the logarithm of scan rate indicated adsorption controlled behavior of electrode process. Concentration variations show a good linear response in the range 0.05 µM to 40 µM with the detection limit of 5.25 × 10-8 M. Conclusion: The prepared sensor exhibited good selectivity, sensitivity, and stability for the detection of DFC in the pharmaceutical dosage form and real samples. The developed method could possibly be adopted for pharmacokinetic studies and also in clinical and quality control laboratories where time and economy were important.

scholarly journals L-ARGININE DETERMINATION IN BIOLOGICALLY ACTIVE ADDITIVE BY VOLTAMMETRY

2020 ◽  
Vol 63 (7) ◽  
pp. 4-9
Author(s):  
Valentina A. Popova ◽  
Maria N. Ponomareva ◽  
Elena I. Korotkova
Keyword(s):  
Differential Pulse Voltammetry ◽  
Dietary Supplement ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Differential Pulse ◽  
Biologically Active ◽  
Carbon Electrode ◽  
Scan Rate ◽  
Pulse Voltammetry

This article reports about the electrochemical determination of L-arginine on a glassy carbon electrode in a dietary supplement using anodic differential pulse voltammetry. The exponential depense of the peak current on the square root of the scan rate (I/v1/2), the shifts of the potential to the negative area and linear correlation between peak potential and logarithm of the scan rate (lg(v)) confirms that electrooxidation of L-arginine is an irreversible process. Moreover, the criteria of Semerano equals 0.4 may indicate the process of electrooxidation without adsorption. The effect of pH, accumulation potential, accumulation time and scan rate was tested on electrochemical behavior of L-arginine. Working conditions for L-arginine determination in model media are following: pH 13; Eacc 0.3 V, tacc 30 s; v = 60 mV s-1. A linear dependence of L-arginine electrooxidation current on its concentration was observed at the 0.9 V in the range between 1.0∙10-4 and 10∙10-4 mol l-1. The detection limit was 1.34∙10-6 mol l-1. A comparative determination of L-arginine in dietary supplement was carried out by the voltammetric method and capillary electrophoresis. Thus, the determination of L-arginine in a dietary supplement on a glassy carbon electrode in NaOH solution (pH 13) was successfully carried out using anodic differential pulse voltammetry. The proposed method does not require sample preparation and allows to quickly determine L-arginine in dietary supplement.

Electrochemical behavior of the insecticide pymetrozine at an electrochemically pretreated glassy carbon electrode and its analytical application

2015 ◽  
Vol 7 (21) ◽  
pp. 9100-9107 ◽  
Author(s):  
Donglin Jia ◽  
Jian Gao ◽  
Lu Wang ◽  
Yudong Gao ◽  
Baoxian Ye
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrochemical Behavior ◽  
Electrochemical Method ◽  
Analytical Application ◽  
Carbon Electrode

A simple and sensitive electrochemical method for the determination of the insecticide pymetrozine was proposed using a simple electrochemically pretreated glassy carbon electrode (EPGCE).

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