Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples
The use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and n...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Analytical Methods in Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2016/9802738 |
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| author | Andréa Claudia Oliveira Silva Luis Carlos Ferreira de Oliveira Angladis Vieira Delfino Mario Roberto Meneghetti Fabiane Caxico de Abreu |
| author_facet | Andréa Claudia Oliveira Silva Luis Carlos Ferreira de Oliveira Angladis Vieira Delfino Mario Roberto Meneghetti Fabiane Caxico de Abreu |
| author_sort | Andréa Claudia Oliveira Silva |
| collection | DOAJ |
| description | The use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and nanotubes with differential pulse anodic stripping voltammetry (DPASV) and examines the simultaneous determination of copper and lead. The glassy carbon electrode modified by gold nanoparticles demonstrated increased sensitivity and decreased detection limits, among other improvements in analytical performance data. Under optimized conditions (deposition potential −0.8 V versus Ag/AgCl; deposition time, 300 s; resting time, 10 s; pulse amplitude, 50 mV; and voltage step height, 4 mV), the detection limits were 0.2279 and 0.3321 ppb, respectively, for determination of Pb2+ and Cu2+. The effects of cations and anions on the simultaneous determination of metal ions do not exhibit significant interference, thereby demonstrating the selectivity of the electrode for simultaneous determination of Pb2+ and Cu2+. The same method was also used to determine Cu2+ in water samples. |
| format | Article |
| id | doaj-art-31c0b22f87234783b212392ae4d97206 |
| institution | Kabale University |
| issn | 2090-8865 2090-8873 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Analytical Methods in Chemistry |
| spelling | doaj-art-31c0b22f87234783b212392ae4d972062025-02-03T05:44:47ZengWileyJournal of Analytical Methods in Chemistry2090-88652090-88732016-01-01201610.1155/2016/98027389802738Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water SamplesAndréa Claudia Oliveira Silva0Luis Carlos Ferreira de Oliveira1Angladis Vieira Delfino2Mario Roberto Meneghetti3Fabiane Caxico de Abreu4Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, BrazilInstituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, BrazilInstituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, BrazilInstituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, BrazilInstituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, BrazilThe use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and nanotubes with differential pulse anodic stripping voltammetry (DPASV) and examines the simultaneous determination of copper and lead. The glassy carbon electrode modified by gold nanoparticles demonstrated increased sensitivity and decreased detection limits, among other improvements in analytical performance data. Under optimized conditions (deposition potential −0.8 V versus Ag/AgCl; deposition time, 300 s; resting time, 10 s; pulse amplitude, 50 mV; and voltage step height, 4 mV), the detection limits were 0.2279 and 0.3321 ppb, respectively, for determination of Pb2+ and Cu2+. The effects of cations and anions on the simultaneous determination of metal ions do not exhibit significant interference, thereby demonstrating the selectivity of the electrode for simultaneous determination of Pb2+ and Cu2+. The same method was also used to determine Cu2+ in water samples.http://dx.doi.org/10.1155/2016/9802738 |
| spellingShingle | Andréa Claudia Oliveira Silva Luis Carlos Ferreira de Oliveira Angladis Vieira Delfino Mario Roberto Meneghetti Fabiane Caxico de Abreu Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples Journal of Analytical Methods in Chemistry |
| title | Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples |
| title_full | Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples |
| title_fullStr | Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples |
| title_full_unstemmed | Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples |
| title_short | Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu2+ and Pb2+ in Water Samples |
| title_sort | electrochemical study of carbon nanotubes nanohybrids for determination of metal species cu2 and pb2 in water samples |
| url | http://dx.doi.org/10.1155/2016/9802738 |
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