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Article: Application of carbon fibre ultramicroelectrode for studying the impact of environmental pollutants on frog's egg

TitleApplication of carbon fibre ultramicroelectrode for studying the impact of environmental pollutants on frog's egg
Authors
KeywordsCarbon Fibre Ultramicroelectrode
Differential Pulse Anodic Stripping Voltammetry
Heavy Metals
In Vivo Electrochemistry
Issue Date1997
PublisherPergamon. 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?
AbstractThe 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 Identifierhttp://hdl.handle.net/10722/167559
ISSN
2015 Impact Factor: 4.803
2015 SCImago Journal Rankings: 1.391
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFung, YSen_US
dc.contributor.authorWong, CCWen_US
dc.contributor.authorDeng, JQen_US
dc.date.accessioned2012-10-08T03:08:29Z-
dc.date.available2012-10-08T03:08:29Z-
dc.date.issued1997en_US
dc.identifier.citationElectrochimica Acta, 1997, v. 42 n. 20-22, p. 3257-3264en_US
dc.identifier.issn0013-4686en_US
dc.identifier.urihttp://hdl.handle.net/10722/167559-
dc.description.abstractThe 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.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electactaen_US
dc.relation.ispartofElectrochimica Actaen_US
dc.subjectCarbon Fibre Ultramicroelectrodeen_US
dc.subjectDifferential Pulse Anodic Stripping Voltammetryen_US
dc.subjectHeavy Metalsen_US
dc.subjectIn Vivo Electrochemistryen_US
dc.titleApplication of carbon fibre ultramicroelectrode for studying the impact of environmental pollutants on frog's eggen_US
dc.typeArticleen_US
dc.identifier.emailFung, YS:ysfung@hku.hken_US
dc.identifier.authorityFung, YS=rp00697en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0013-4686(97)00176-X-
dc.identifier.scopuseid_2-s2.0-0030703832en_US
dc.identifier.hkuros31414-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030703832&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume42en_US
dc.identifier.issue20-22en_US
dc.identifier.spage3257en_US
dc.identifier.epage3264en_US
dc.identifier.isiWOS:A1997XV10300032-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridFung, YS=13309754700en_US
dc.identifier.scopusauthoridWong, CCW=13309452900en_US
dc.identifier.scopusauthoridDeng, JQ=7402613164en_US

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