Voltammetric determination of cobalt (II) using a glassy carbon working electrode

1981 ◽  
Vol 309 (5) ◽  
pp. 397-398 ◽  
Author(s):  
M. Čakrt ◽  
J. Berčík ◽  
Z. Hladký ◽  
A. Mathiasová
Keyword(s):  
Glassy Carbon ◽  
Voltammetric Determination ◽  
Working Electrode

scholarly journals Voltammetric determination of imidacloprid and thiamethoxam

2005 ◽  
Vol 70 (5) ◽  
pp. 735-743 ◽  
Author(s):  
Valeria Guzsvány ◽  
Ferenc Gaál ◽  
Luka Bjelica ◽  
Silvija Ökrész
Keyword(s):  
Glassy Carbon ◽  
Electrode Surface ◽  
Limit Of Detection ◽  
Voltammetric Determination ◽  
Polarization Mode ◽  
Voltammetric Method ◽  
Surface Pretreatment ◽  
Working Electrode ◽  
Limit Of Quantitation

A simple voltammetric method using a glassy carbon working electrode was developed for the determination of two members from the neonicotinoid group of insecticides: imidacloprid and thiamethoxam. The experiments showed that the voltammetric response depends on the mode of electrode surface pretreatment and the polarization mode. The response appeared to be linear in the range from 0.028 to 0.50 mg/cm3 for both analyses. The limit of detection was 0.0077 mg/cm3 for imidacloprid and 0.0085 mg/cm3 for thiamethoxam, the limit of quantitation was 0.026 mg/cm3 and 0.028 mg/cm3, respectively. The developed method was applied for the determination of these insecticides in potato samples sprayed with Confidor 200-SL or Actara 25-WG as well as commercial formulations of imidacloprid and thiamethoxam. A recovery trial was performed to assess the accuracy of the results, the recovery values being between 95?102 % for both of neonicotinoids.

The voltammetric determination of 4-nitrobiphenyl

1991 ◽  
Vol 56 (3) ◽  
pp. 595-601 ◽  
Author(s):  
Jiří Barek ◽  
Gulamustafa Malik ◽  
Jiří Zima
Keyword(s):  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Hanging Mercury Drop Electrode ◽  
Optimum Conditions ◽  
Mercury Drop Electrode ◽  
Working Electrode ◽  
Pulse Voltammetry ◽  
Unstirred Solution

Optimum conditions were found for the determination of 4-nitrobiphenyl by fast scan differential pulse voltammetry at a hanging mercury drop electrode in the concentration range 1 . 10-5 to 2 . 10-7 mol l-1. A further increase in sensitivity was attained by adsorptive accumulation of this substance on the surface of the working electrode, permitting determination in the concentration range (2 – 10) . 10-8 mol l-1 with one minute accumulation of the substance in unstirred solution or (2 – 10) . 10-9 mol l-1 with three-minute accumulation in stirred solution. Linear scan voltammetry can be used to determine 4-nitrobiphenyl in the concentration range (2 – 10) . 10-9 mol l-1 with five-minute accumulation in stirred solution, with the advantage of a smoother baseline and smaller interference from substances that yield only tensametric peaks.

Differential pulse voltammetric determination of fenobucarb at the glassy carbon electrode, after its alkaline hydrolysis to a phenolic product

1997 ◽  
Vol 9 (12) ◽  
pp. 952-955 ◽  
Author(s):  
Agustina Guiberteau Cabanillas ◽  
Teresa Galeano Díaz ◽  
Francisco Salinas ◽  
Juan Manuel Ortiz ◽  
Jean Michel Kauffmann
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Alkaline Hydrolysis ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Carbon Electrode

scholarly journals Voltammetric determination of dopamine and norepinphrine on a glassy carbon electrode modified with poly (L-aspartic acid)

2012 ◽  
Vol 124 (2) ◽  
pp. 537-544 ◽  
Author(s):  
ZHANGYU YU ◽  
XIAOCHUN LI ◽  
XUELIANG WANG ◽  
XINYING MA ◽  
XIA LI ◽  
...  
Keyword(s):  
Aspartic Acid ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Voltammetric Determination ◽  
Carbon Electrode
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