File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Cloud-point extraction of nodularin-R from natural waters

TitleCloud-point extraction of nodularin-R from natural waters
Authors
KeywordsCloud-point extraction
Cyanobacterial toxin
Natural waters
Nodularin-R
Issue Date2004
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/aca
Citation
Analytica Chimica Acta, 2004, v. 509 n. 1, p. 63-70 How to Cite?
AbstractA cloud-point extraction (CPE) technique for the determination of a cyanobacterial hepatotoxin, nodularin-R, in aqueous media using a cationic surfactant, tricaprylmethylammonium chloride (Aliquat-336), was developed. Cloud-point phase separation of Aliquat-336 at ambient temperature was induced by the addition of sodium sulfate. The Aliquat-336/Na2SO4 CPE system displayed large preconcentration factor, FC, for nodularin-R. At the operational CPE conditions, FC of 709.2 was achieved. Distribution constant, KD, of the distribution of nodularin-R between the surfactant-rich and aqueous phases of the CPE system was estimated to be (4.94±0.8)×103. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 330pgml-1 (in freshwater)/1.3ngml-1 (in seawater) and a repeatability of 6.4% (in freshwater) (n=7, P<0.05) for nodularin-R in a sample of 25ml. The CPE is a rapid process and no cleanup step is required. Effects of pH, natural abundant anion (chloride) and dissolved organic matters (DOM, humic acid, HA) on the extraction efficiency were evaluated. A double CPE technique was developed to overcome interferences encountered in the analysis of environmental samples. Applicability of the new method to the determination of nodularin-R in real coastal marine water samples has also been demonstrated. © 2003 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/92743
ISSN
2015 Impact Factor: 4.712
2015 SCImago Journal Rankings: 1.548
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYu, Hen_HK
dc.contributor.authorMan, BKWen_HK
dc.contributor.authorChan, LLNen_HK
dc.contributor.authorLam, MHWen_HK
dc.contributor.authorLam, PKSen_HK
dc.contributor.authorWang, Len_HK
dc.contributor.authorJin, Hen_HK
dc.contributor.authorWu, RSSen_HK
dc.date.accessioned2010-09-17T10:55:51Z-
dc.date.available2010-09-17T10:55:51Z-
dc.date.issued2004en_HK
dc.identifier.citationAnalytica Chimica Acta, 2004, v. 509 n. 1, p. 63-70en_HK
dc.identifier.issn0003-2670en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92743-
dc.description.abstractA cloud-point extraction (CPE) technique for the determination of a cyanobacterial hepatotoxin, nodularin-R, in aqueous media using a cationic surfactant, tricaprylmethylammonium chloride (Aliquat-336), was developed. Cloud-point phase separation of Aliquat-336 at ambient temperature was induced by the addition of sodium sulfate. The Aliquat-336/Na2SO4 CPE system displayed large preconcentration factor, FC, for nodularin-R. At the operational CPE conditions, FC of 709.2 was achieved. Distribution constant, KD, of the distribution of nodularin-R between the surfactant-rich and aqueous phases of the CPE system was estimated to be (4.94±0.8)×103. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 330pgml-1 (in freshwater)/1.3ngml-1 (in seawater) and a repeatability of 6.4% (in freshwater) (n=7, P<0.05) for nodularin-R in a sample of 25ml. The CPE is a rapid process and no cleanup step is required. Effects of pH, natural abundant anion (chloride) and dissolved organic matters (DOM, humic acid, HA) on the extraction efficiency were evaluated. A double CPE technique was developed to overcome interferences encountered in the analysis of environmental samples. Applicability of the new method to the determination of nodularin-R in real coastal marine water samples has also been demonstrated. © 2003 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/acaen_HK
dc.relation.ispartofAnalytica Chimica Actaen_HK
dc.subjectCloud-point extractionen_HK
dc.subjectCyanobacterial toxinen_HK
dc.subjectNatural watersen_HK
dc.subjectNodularin-Ren_HK
dc.titleCloud-point extraction of nodularin-R from natural watersen_HK
dc.typeArticleen_HK
dc.identifier.emailWu, RSS: rudolfwu@hku.hken_HK
dc.identifier.authorityWu, RSS=rp01398en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.aca.2003.12.019en_HK
dc.identifier.scopuseid_2-s2.0-1542509421en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1542509421&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume509en_HK
dc.identifier.issue1en_HK
dc.identifier.spage63en_HK
dc.identifier.epage70en_HK
dc.identifier.isiWOS:000220439000008-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridYu, H=7405852208en_HK
dc.identifier.scopusauthoridMan, BKW=7003818463en_HK
dc.identifier.scopusauthoridChan, LLN=7403540832en_HK
dc.identifier.scopusauthoridLam, MHW=7202630175en_HK
dc.identifier.scopusauthoridLam, PKS=7202365776en_HK
dc.identifier.scopusauthoridWang, L=7409177182en_HK
dc.identifier.scopusauthoridJin, H=7403073159en_HK
dc.identifier.scopusauthoridWu, RSS=7402945079en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats