The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry
The fast electrochemical deposition of both mercury and amalgam films, a crucial step in analytical anodic stripping voltammetry, is demonstrated to occur in the presence of power ultrasound emitted from an immersion horn probe which was placed opposite the working electrode in a conventional three...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1997
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| _version_ | 1797090957012762624 |
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| author | Marken, F Rebbitt, T Booth, J Compton, R |
| author_facet | Marken, F Rebbitt, T Booth, J Compton, R |
| author_sort | Marken, F |
| collection | OXFORD |
| description | The fast electrochemical deposition of both mercury and amalgam films, a crucial step in analytical anodic stripping voltammetry, is demonstrated to occur in the presence of power ultrasound emitted from an immersion horn probe which was placed opposite the working electrode in a conventional three electrode cell. Due to considerably enhanced mass transport the rate of deposition is strongly increased compared to 'silent' conditions. The total amount of mercury adhering to a glassy carbon electrode surface, however, is limited to a 'thin film' of microscopically small droplets of mercury as shown by atomic force microscopy and voltammetry. Due to surface forces induced by ultrasound, abrasion of some of the deposit occurs and after a certain period of time the parallel electro-deposition and abrasion processes reach a 'steady state'. The deposition of mercury in the presence of Pb2+ or Cu2+ results in the formation of an amalgam and well-defined, very sharp 'stripping' responses for the oxidation process of the corresponding amalgam were detected. The merit of insonation in analytical electrode preconcentration techniques is dicussed. |
| first_indexed | 2024-03-07T03:26:07Z |
| format | Journal article |
| id | oxford-uuid:b9172fa7-8c4b-4899-808d-5a98f2b7c55c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:26:07Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:b9172fa7-8c4b-4899-808d-5a98f2b7c55c2022-03-27T05:00:34ZThe use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b9172fa7-8c4b-4899-808d-5a98f2b7c55cEnglishSymplectic Elements at Oxford1997Marken, FRebbitt, TBooth, JCompton, RThe fast electrochemical deposition of both mercury and amalgam films, a crucial step in analytical anodic stripping voltammetry, is demonstrated to occur in the presence of power ultrasound emitted from an immersion horn probe which was placed opposite the working electrode in a conventional three electrode cell. Due to considerably enhanced mass transport the rate of deposition is strongly increased compared to 'silent' conditions. The total amount of mercury adhering to a glassy carbon electrode surface, however, is limited to a 'thin film' of microscopically small droplets of mercury as shown by atomic force microscopy and voltammetry. Due to surface forces induced by ultrasound, abrasion of some of the deposit occurs and after a certain period of time the parallel electro-deposition and abrasion processes reach a 'steady state'. The deposition of mercury in the presence of Pb2+ or Cu2+ results in the formation of an amalgam and well-defined, very sharp 'stripping' responses for the oxidation process of the corresponding amalgam were detected. The merit of insonation in analytical electrode preconcentration techniques is dicussed. |
| spellingShingle | Marken, F Rebbitt, T Booth, J Compton, R The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
| title | The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
| title_full | The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
| title_fullStr | The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
| title_full_unstemmed | The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
| title_short | The use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
| title_sort | use of ultrasound in the enhancement of the deposition and detection of metals in anodic stripping voltammetry |
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