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Article: Application of carbon fibre ultramicroelectrode for studying the impact of environmental pollutants on frog's egg
Title | Application of carbon fibre ultramicroelectrode for studying the impact of environmental pollutants on frog's egg |
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Authors | |
Keywords | Carbon Fibre Ultramicroelectrode Differential Pulse Anodic Stripping Voltammetry Heavy Metals In Vivo Electrochemistry |
Issue Date | 1997 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta |
Citation | Electrochimica Acta, 1997, v. 42 n. 20-22, p. 3257-3264 How to Cite? |
Abstract | The application of a carbon fibre ultramicroelectrode (length 0.5 mm, diameter 8 μm) to assess the impact of heavy metals on the eggs of two species of frog, the Xenopus laevis and the Rana sylvatica, was investigated. Coating mercury on carbon fibre electrode was found to improve the sensitivity and selectivity of the DPASV method. Using neutral buffer at pH 7 to simulate the frog's egg for the determination of Zn, Cd, Pb and Cu, the working ranges were found to be: 0.1-5, 0.001-0.1, 0.05-0.2, and 0.05-1 ppm, detection limits 5, 0.3, 0.4, and 0.2 ppb, respectively, and repeatability 3.3 to 13% RSD. Using the standard addition method, Zn, Cd, Pb and Cu in the eggs of Rana sylvatica/Xenopus laevis were found to be 19/30, 0.5/0.5, 1.5/2.5, and not detected/1.2 ppb respectively. During environmental studies, Zn, Pb and Cd were enriched in the eggs, whereas Cu was found to be decreased. The concentrations of heavy metals were observed to decrease upon longer exposure time and at a higher temperature. The enrichment factors were found to decrease at higher metal concentration, indicating a reduction in the uptake of heavy metals at higher concentrations. The pH of the exposed solution was found to affect both peak current and potential and thus the pH of the exposed solution was buffered at 7. The carbon fibre ultramicroelectrode coated with mercury was shown to provide a suitable tool for micro-environmental investigation and the frog's egg an effective biological indicator to assess the impact of pollutants on the environment to take into account of the biological variation in exposure to heavy metals. © 1997 Published by Elsevier Science Ltd. |
Persistent Identifier | http://hdl.handle.net/10722/167559 |
ISSN | 2023 Impact Factor: 5.5 2023 SCImago Journal Rankings: 1.159 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Fung, YS | en_US |
dc.contributor.author | Wong, CCW | en_US |
dc.contributor.author | Deng, JQ | en_US |
dc.date.accessioned | 2012-10-08T03:08:29Z | - |
dc.date.available | 2012-10-08T03:08:29Z | - |
dc.date.issued | 1997 | en_US |
dc.identifier.citation | Electrochimica Acta, 1997, v. 42 n. 20-22, p. 3257-3264 | en_US |
dc.identifier.issn | 0013-4686 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/167559 | - |
dc.description.abstract | The application of a carbon fibre ultramicroelectrode (length 0.5 mm, diameter 8 μm) to assess the impact of heavy metals on the eggs of two species of frog, the Xenopus laevis and the Rana sylvatica, was investigated. Coating mercury on carbon fibre electrode was found to improve the sensitivity and selectivity of the DPASV method. Using neutral buffer at pH 7 to simulate the frog's egg for the determination of Zn, Cd, Pb and Cu, the working ranges were found to be: 0.1-5, 0.001-0.1, 0.05-0.2, and 0.05-1 ppm, detection limits 5, 0.3, 0.4, and 0.2 ppb, respectively, and repeatability 3.3 to 13% RSD. Using the standard addition method, Zn, Cd, Pb and Cu in the eggs of Rana sylvatica/Xenopus laevis were found to be 19/30, 0.5/0.5, 1.5/2.5, and not detected/1.2 ppb respectively. During environmental studies, Zn, Pb and Cd were enriched in the eggs, whereas Cu was found to be decreased. The concentrations of heavy metals were observed to decrease upon longer exposure time and at a higher temperature. The enrichment factors were found to decrease at higher metal concentration, indicating a reduction in the uptake of heavy metals at higher concentrations. The pH of the exposed solution was found to affect both peak current and potential and thus the pH of the exposed solution was buffered at 7. The carbon fibre ultramicroelectrode coated with mercury was shown to provide a suitable tool for micro-environmental investigation and the frog's egg an effective biological indicator to assess the impact of pollutants on the environment to take into account of the biological variation in exposure to heavy metals. © 1997 Published by Elsevier Science Ltd. | en_US |
dc.language | eng | en_US |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta | en_US |
dc.relation.ispartof | Electrochimica Acta | en_US |
dc.subject | Carbon Fibre Ultramicroelectrode | en_US |
dc.subject | Differential Pulse Anodic Stripping Voltammetry | en_US |
dc.subject | Heavy Metals | en_US |
dc.subject | In Vivo Electrochemistry | en_US |
dc.title | Application of carbon fibre ultramicroelectrode for studying the impact of environmental pollutants on frog's egg | en_US |
dc.type | Article | en_US |
dc.identifier.email | Fung, YS:ysfung@hku.hk | en_US |
dc.identifier.authority | Fung, YS=rp00697 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/S0013-4686(97)00176-X | - |
dc.identifier.scopus | eid_2-s2.0-0030703832 | en_US |
dc.identifier.hkuros | 31414 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0030703832&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 42 | en_US |
dc.identifier.issue | 20-22 | en_US |
dc.identifier.spage | 3257 | en_US |
dc.identifier.epage | 3264 | en_US |
dc.identifier.isi | WOS:A1997XV10300032 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Fung, YS=13309754700 | en_US |
dc.identifier.scopusauthorid | Wong, CCW=13309452900 | en_US |
dc.identifier.scopusauthorid | Deng, JQ=7402613164 | en_US |
dc.identifier.issnl | 0013-4686 | - |