Evaluation of carbon paste electrodes modified with 1-furoylthioureas for the analysis of cadmium by differential pulse anodic stripping voltammetry

2007 ◽  
Vol 123 (1) ◽  
pp. 488-494 ◽  
Author(s):  
O. Estévez-Hernández ◽  
I. Naranjo-Rodríguez ◽  
J.L. Hidalgo-Hidalgo de Cisneros ◽  
E. Reguera
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Carbon Paste Electrodes ◽  
Anodic Stripping

Gold-Plated Carbon Paste Electrodes for Anodic Stripping Determination of Arsenic

2000 ◽  
Vol 65 (6) ◽  
pp. 1035-1046 ◽  
Author(s):  
Petr Chadim ◽  
Ivan Švancara ◽  
Boris Pihlar ◽  
Karel Vytřas
Keyword(s):  
Deposition Time ◽  
Supporting Electrolyte ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Carbon Paste ◽  
Carbon Paste Electrodes ◽  
Experimental Parameters ◽  
Anodic Stripping ◽  
Interference Studies

The applications of gold-plated carbon paste electrodes in anodic stripping voltammetry have been studied in an effort to develop a simple and effective method for the determination of arsenic in water samples. The investigations performed included the choice of supporting electrolyte composition, the optimisation of important experimental parameters, search for appropriate procedure to reduce As(V) to As(III), and some tests of practical applicability of the method, including interference studies. Under optimised conditions, the signal of As was linear within 5-50 μg l-1 with a detection limit of about 1 μg l-1 As (deposition time 10 min). Common elements or ions did not interfere except for Cu(II). The analytical performance of the method has been tested in recovery measurements with model solutions.

scholarly journals Differential Pulse Anodic Stripping Voltammetry for Mercury Determination

2015 ◽  
Vol 23 (1) ◽  
pp. 13-24
Author(s):  
Paul C. Vereștiuc ◽  
Oana-Maria Tucaliuc ◽  
Iuliana G. Breabăn ◽  
Igor Crețescu ◽  
Gheorghe Nemțoi
Keyword(s):  
Carbon Paste Electrode ◽  
Silver Chloride ◽  
Anodic Stripping Voltammetry ◽  
Background Electrolyte ◽  
Stripping Voltammetry ◽  
Differential Pulse ◽  
Mercury Determination ◽  
Carbon Paste ◽  
Anodic Stripping ◽  
Paste Electrode

AbstactIn the present work voltammetric investigations have been performed on HgCl2aqueous solutions prepared from a Cz 9024 reagent. Carbon paste electrode (CPE), eriochrome black T modified carbon paste electrode (MCPE/EBT) and KCl 1M as background electrolyte, were involved within the experimental procedures. Cyclic voltammetry (CV) has been performed in order to compare the behaviour of the two electrodes in both K3[Fe(CN)6] and mercury calibration aqueous solution. Differential pulse anodic stripping voltammetry (DPASV) was used to determine the most suitable parameters for mercury determination. All experiments were performed at 25 ± 1 ℃, using an electrochemical cell with three-electrodes connected to an Autolab PG STAT 302N (Metrohm-Autolab) potentiostat that is equipped with Nova 1.11 software. The measured potential values were generated by using the silver chloride electrode (AgClE) as reference and a platinum wire electrode as auxiliary. A series of time depending equations for the pre-concentration and concentration steps were established, with the observation that a higher sensitivity can be obtained while increasing the pre-concentration time. DPASV were drawn using the CPE in 11.16 % coriander, as mercury complex, the voltamograms signals indicating mercury oxidation, with signal intensity increasing in time.

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