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Article: Application of carbon fibre microelectrode for studying the impact of pesticides on a frog's egg

TitleApplication of carbon fibre microelectrode for studying the impact of pesticides on a frog's egg
Authors
Issue Date1999
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta
Citation
Electrochimica Acta, 1999, v. 44 n. 21, p. 3855-3864 How to Cite?
AbstractWith the use of Differential Pulse Voltammetry (DPV), the carbon fibre microelectrode (30 micron diameter) encapsulated in a glass capillary with a 0.5 mm length exposed to solution was investigated as a tool to probe the entrance of electrochemically active pesticides into the frog's fertilized egg so as to study the baseline contamination and to assess the impact of environmental pollutants in water under changing environmental conditions. Frog's egg is a suitable biological system as its development from a single cell occurs in the natural environment with direct exposure to pesticides discharged to water bodies by human activities. Common pesticides such as parathion methyl, parathion ethyl, azinphos methyl and coumaphos were investigated using a carbon fibre microelectrode with optimized DPV conditions as follows: scan rate, 40 m V/s; pulse width, 12.5 ms; pulse amplitude, 100 ms and scan increment, 4 mV. Satisfactory results for the analytical performance were obtained showing detection limits at ppb range, good repeatability (RSD < 7%) and working ranges covering concentrations over three orders of magnitude for the pesticides studied. Results on the effect of various environmental conditions such as temperature, pollutants concentration and exposure time showed biological variation in the response of the frog's egg to pesticide exposure and its suitability as an effective biological indicator to provide a continuous in situ assessment of the environmental impact of pesticides.
Persistent Identifierhttp://hdl.handle.net/10722/167609
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.authorMak, JLLen_US
dc.date.accessioned2012-10-08T03:09:01Z-
dc.date.available2012-10-08T03:09:01Z-
dc.date.issued1999en_US
dc.identifier.citationElectrochimica Acta, 1999, v. 44 n. 21, p. 3855-3864en_US
dc.identifier.issn0013-4686en_US
dc.identifier.urihttp://hdl.handle.net/10722/167609-
dc.description.abstractWith the use of Differential Pulse Voltammetry (DPV), the carbon fibre microelectrode (30 micron diameter) encapsulated in a glass capillary with a 0.5 mm length exposed to solution was investigated as a tool to probe the entrance of electrochemically active pesticides into the frog's fertilized egg so as to study the baseline contamination and to assess the impact of environmental pollutants in water under changing environmental conditions. Frog's egg is a suitable biological system as its development from a single cell occurs in the natural environment with direct exposure to pesticides discharged to water bodies by human activities. Common pesticides such as parathion methyl, parathion ethyl, azinphos methyl and coumaphos were investigated using a carbon fibre microelectrode with optimized DPV conditions as follows: scan rate, 40 m V/s; pulse width, 12.5 ms; pulse amplitude, 100 ms and scan increment, 4 mV. Satisfactory results for the analytical performance were obtained showing detection limits at ppb range, good repeatability (RSD < 7%) and working ranges covering concentrations over three orders of magnitude for the pesticides studied. Results on the effect of various environmental conditions such as temperature, pollutants concentration and exposure time showed biological variation in the response of the frog's egg to pesticide exposure and its suitability as an effective biological indicator to provide a continuous in situ assessment of the environmental impact of pesticides.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.titleApplication of carbon fibre microelectrode for studying the impact of pesticides on a 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(99)00093-6-
dc.identifier.scopuseid_2-s2.0-0032669718en_US
dc.identifier.hkuros54347-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032669718&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume44en_US
dc.identifier.issue21en_US
dc.identifier.spage3855en_US
dc.identifier.epage3864en_US
dc.identifier.isiWOS:000081560800030-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridFung, YS=13309754700en_US
dc.identifier.scopusauthoridMak, JLL=7103323434en_US

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