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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Anodic stripping voltammetric determination of copper(II) using a functionalized carbon nanotubes paste electrode modified with crosslinked chitosan

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Author(s):
Janegitz, Bruno C. [1] ; Marcolino-Junior, Luiz H. [2] ; Campana-Filho, Sergio P. [3] ; Faria, Ronaldo C. [1] ; Fatibello-Filho, Orlando [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Quim, Ctr Ciencias Exatas & Tecnol, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Fed Parana, Dept Quim, BR-80060000 Curitiba, PR - Brazil
[3] Univ Sao Paulo, Inst Quim Sao Carlos, BR-05508 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: SENSORS AND ACTUATORS B-CHEMICAL; v. 142, n. 1, p. 260-266, OCT 12 2009.
Web of Science Citations: 119
Abstract

The development and application of a functionalized carbon nanotubes paste electrode (CNPE) modified with crosslinked chitosan for determination of Cu(II) in industrial wastewater, natural water and human urine samples by linear scan anodic stripping voltammetry (LSASV) are described. Different electrodes were constructed using chitosan and chitosan crosslinked with glutaraldehyde (CTS-GA) and epichlorohydrin (CTS-ECH). The best voltammetric response for Cu(II) was obtained with a paste composition of 65% (m/m) of functionalized carbon nanotubes, 15% (m/m) of CTS-ECH, and 20% (m/m) of mineral oil using a solution of 0.05 mol L(-1) KNO(3) with pH adjusted to 2.25 with HNO(3), an accumulation potential of 0.3V vs. Ag/AgCl (3.0 mol L(-1) KCl) for 300 s and a scan rate of 100 mV s(-1). Under these optimal experimental conditions, the voltammetric response was linearly dependent on the Cu(II) concentration in the range from 7.90 x 10(-8) to 1.60 x 10(-5) mol L(-1) with a detection limit of 1.00 x 10(-8) mol L(-1). The samples analyses were evaluated using the proposed sensor and a good recovery of Cu(II) was obtained with results in the range from 98.0% to 104%. The analysis of industrial wastewater, natural water and human urine samples obtained using the proposed CNPE modified with CTS-ECH electrode and those obtained using a comparative method are in agreement at the 95% confidence level. (C) 2009 Elsevier B. V. All rights reserved. (AU)

FAPESP's process: 06/05146-0 - Development of sensors using carbon nanotubes or graphite powder modified with crosslinked chitosan to determine high toxicity metal ions in wastewater
Grantee:Bruno Campos Janegitz
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 07/08365-7 - Development, characterization and analytical application of the modified electrodes with carbon nanotubes and reticulated quitosan
Grantee:Ronaldo Censi Faria
Support Opportunities: Regular Research Grants