Linked Life Data

18371615

Source:http://linkedlifedata.com/resource/pubmed/id/18371615

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2008-3-28
pubmed:abstractText
The construction and performance of a liquid membrane electrode responsive to N-(1,1,2,2-tetrahydroperfluorooctyl)-N,N,N-trimethylammonium bromide (FTABr) and its use for the study of beta-cyclodextrin/fluorinated surfactant inclusion complex is described. The electrode is based on the use of tetrahydroperfluorooctyltrimethylammonium-tetraphenylborate ion pair as electro active material in polyvinyl chloride (PVC) matrix plasticized using 2-Nitrophenyl octyl ether (NPOE). The electrode exhibits a fast, stable, reproducible and "Nernstian" response (59+/-2 mV) for FTABr over the concentration range of 10(-5) to 2 x 10(-3) mol L(-1) at 298 K. The lowest detection limit is 2 x 10(-6) mol L(-1) and the response time is around 20-30s. The validity of the electrode, for detection of fluorinated surfactant ions and hence to carry out electrochemical measurements to study micellization of fluorinated surfactant, is verified by comparing the critical micelle concentration (cmc) value of FTABr obtained by using the electrode, with that obtained by surface tension measurements. Association constant K for beta-cyclodextrin/FTABr complex is evaluated from the potentiometric measurements carried out using this electrode and is observed to be approximately 1.26 x 10(5). The results suggest that beta-cyclodextrin forms an equimolar association complex with the FTA+ surfactant ion.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1873-3573
pubmed:author
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
74
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
72-7
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Study of beta-cyclodextrin/fluorinated trimethyl ammonium bromide surfactant inclusion complex by fluorinated surfactant ion selective electrode.
pubmed:affiliation
Université Pierre et Marie Curie-Paris 6, UMR7575 (LECA), Case Courrier 39, 4 Place Jussieu, 75252 Cédex 05, Paris F-75005, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Evaluation Studies