Sono-electroanalysis: Application to the detection of lead in wine
The quantitative detection of lead in wine is shown to be possible by anodic stripping voltammetry under conditions of insonation. An immersion horn probe is introduced into a thermostatted conventional three-electrode cell opposite a mercury plated platinum disc working electrode. Following acidifi...
| 主要な著者: | , , , , |
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| フォーマット: | Journal article |
| 言語: | English |
| 出版事項: |
1998
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| _version_ | 1826275367631978496 |
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| author | Akkermans, R Ball, J Rebbitt, T Marken, F Compton, R |
| author_facet | Akkermans, R Ball, J Rebbitt, T Marken, F Compton, R |
| author_sort | Akkermans, R |
| collection | OXFORD |
| description | The quantitative detection of lead in wine is shown to be possible by anodic stripping voltammetry under conditions of insonation. An immersion horn probe is introduced into a thermostatted conventional three-electrode cell opposite a mercury plated platinum disc working electrode. Following acidification of the wine sample lead ions can be reduced at the Hg/Pt electrode surface at -1.0 V (vs SCE). The large mass transport associated with power ultrasound yields efficient pre-concentration of the lead before it is stripped by an anodic linear sweep of the potential. Insonation further offers the crucial benefits of first surface activation and cleaning, helping to prevent electrode fouling by the organic components in wine and second fully equilibrating "free" and "bound" Pb2+ ions in the complex matrix. By use of standard microaddition of lead to the solution the system can be calibrated to give the total amount of lead present. Experiments using samples of a white Italian Chardonnay gave a total lead content of 22 ± 6 μg 1-1. This value was compared with those obtained by independent atomic absorption spectroscopy (AAS) measurements performed by two different laboratories. Quantitative agreement was found. © 1998 Elsevier Science Ltd. All rights reserved. |
| first_indexed | 2024-03-06T22:57:38Z |
| format | Journal article |
| id | oxford-uuid:60fb2f8c-9083-4abd-9e12-3b701b44a63d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:57:38Z |
| publishDate | 1998 |
| record_format | dspace |
| spelling | oxford-uuid:60fb2f8c-9083-4abd-9e12-3b701b44a63d2022-03-26T17:56:37ZSono-electroanalysis: Application to the detection of lead in wineJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:60fb2f8c-9083-4abd-9e12-3b701b44a63dEnglishSymplectic Elements at Oxford1998Akkermans, RBall, JRebbitt, TMarken, FCompton, RThe quantitative detection of lead in wine is shown to be possible by anodic stripping voltammetry under conditions of insonation. An immersion horn probe is introduced into a thermostatted conventional three-electrode cell opposite a mercury plated platinum disc working electrode. Following acidification of the wine sample lead ions can be reduced at the Hg/Pt electrode surface at -1.0 V (vs SCE). The large mass transport associated with power ultrasound yields efficient pre-concentration of the lead before it is stripped by an anodic linear sweep of the potential. Insonation further offers the crucial benefits of first surface activation and cleaning, helping to prevent electrode fouling by the organic components in wine and second fully equilibrating "free" and "bound" Pb2+ ions in the complex matrix. By use of standard microaddition of lead to the solution the system can be calibrated to give the total amount of lead present. Experiments using samples of a white Italian Chardonnay gave a total lead content of 22 ± 6 μg 1-1. This value was compared with those obtained by independent atomic absorption spectroscopy (AAS) measurements performed by two different laboratories. Quantitative agreement was found. © 1998 Elsevier Science Ltd. All rights reserved. |
| spellingShingle | Akkermans, R Ball, J Rebbitt, T Marken, F Compton, R Sono-electroanalysis: Application to the detection of lead in wine |
| title | Sono-electroanalysis: Application to the detection of lead in wine |
| title_full | Sono-electroanalysis: Application to the detection of lead in wine |
| title_fullStr | Sono-electroanalysis: Application to the detection of lead in wine |
| title_full_unstemmed | Sono-electroanalysis: Application to the detection of lead in wine |
| title_short | Sono-electroanalysis: Application to the detection of lead in wine |
| title_sort | sono electroanalysis application to the detection of lead in wine |
| work_keys_str_mv | AT akkermansr sonoelectroanalysisapplicationtothedetectionofleadinwine AT ballj sonoelectroanalysisapplicationtothedetectionofleadinwine AT rebbittt sonoelectroanalysisapplicationtothedetectionofleadinwine AT markenf sonoelectroanalysisapplicationtothedetectionofleadinwine AT comptonr sonoelectroanalysisapplicationtothedetectionofleadinwine |