Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition.
An improved approach to the anodic stripping voltammetric (ASV) determination of heavy metals, using the hanging mercury drop electrode (HMDE), is reported. It was discovered that using very cathodic accumulation potentials, at which the solvent reduction occurs (overpotential deposition), the volta...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2011
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| _version_ | 1826280997880070144 |
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| author | Rodrigues, J Rodrigues, C Almeida, P Valente, I Gonçalves, L Compton, R Barros, A |
| author_facet | Rodrigues, J Rodrigues, C Almeida, P Valente, I Gonçalves, L Compton, R Barros, A |
| author_sort | Rodrigues, J |
| collection | OXFORD |
| description | An improved approach to the anodic stripping voltammetric (ASV) determination of heavy metals, using the hanging mercury drop electrode (HMDE), is reported. It was discovered that using very cathodic accumulation potentials, at which the solvent reduction occurs (overpotential deposition), the voltammetric signals of zinc(II), cadmium(II), lead(II) and copper(II) increase. When compared with the classical methodology a 5 to 10-fold signal increase is obtained. This effect is likely due to both mercury drop oscillation at such cathodic potentials and added local convection at the mercury drop surface caused by the evolution of hydrogen bubbles. |
| first_indexed | 2024-03-07T00:22:09Z |
| format | Journal article |
| id | oxford-uuid:7cec8bc3-060f-4264-84a0-f7c750b0aec2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:22:09Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:7cec8bc3-060f-4264-84a0-f7c750b0aec22022-03-26T21:00:03ZIncreased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7cec8bc3-060f-4264-84a0-f7c750b0aec2EnglishSymplectic Elements at Oxford2011Rodrigues, JRodrigues, CAlmeida, PValente, IGonçalves, LCompton, RBarros, AAn improved approach to the anodic stripping voltammetric (ASV) determination of heavy metals, using the hanging mercury drop electrode (HMDE), is reported. It was discovered that using very cathodic accumulation potentials, at which the solvent reduction occurs (overpotential deposition), the voltammetric signals of zinc(II), cadmium(II), lead(II) and copper(II) increase. When compared with the classical methodology a 5 to 10-fold signal increase is obtained. This effect is likely due to both mercury drop oscillation at such cathodic potentials and added local convection at the mercury drop surface caused by the evolution of hydrogen bubbles. |
| spellingShingle | Rodrigues, J Rodrigues, C Almeida, P Valente, I Gonçalves, L Compton, R Barros, A Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition. |
| title | Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition. |
| title_full | Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition. |
| title_fullStr | Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition. |
| title_full_unstemmed | Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition. |
| title_short | Increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition. |
| title_sort | increased sensitivity of anodic stripping voltammetry at the hanging mercury drop electrode by ultracathodic deposition |
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