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A fluorometric fullerenol sensor for rapid detection of ionic and non-ionic surfactants / H. Härmä in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 1/2010 (01-02/2010)
[article]
Titre : A fluorometric fullerenol sensor for rapid detection of ionic and non-ionic surfactants Type de document : texte imprimé Auteurs : H. Härmä, Auteur ; S. Laakso, Auteur ; S. Pihlasalo, Auteur ; P. Hänninen, Auteur Année de publication : 2010 Article en page(s) : p. 40-42 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Fluorometric fullerenol sensor Rapid detection Buckminsterfullerenes Cationic surfactant Anionic non-ionic Labeled protein Cetyltriammonium bromide (CTAB) Sodium dodecyl sulphate (SDS) Tween 20 Triton X-100 Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A fullerenol sensor utilizing fluorescence quenching of a labeled protein was developed for rapid detection and quantification of ionic (cetyltriammonium bromide (CTAB), sodium dodecyl sulphate, (SDS)) and non-ionic (Tween 20 and Triton X-100) surfactants in solution. The sensor is based on the competitive adsorption of the surfactants and the fluorescently labeled protein to fullerenols – hydroxylated buckminsterfullerenes. The fluorescence quenching between fullerenols and the fluorochrome-labeled protein was detected and related to the replacement of the labeled protein by the surfactants. The non-ionic surfactants could be measured at sub to low micromolar concentrations whereas significantly higher concentration of ionic surfactants was required to efficiently cover the fullerenol surface. The combination of the novel fullerenol sensor with existing micro titer plate fluorometric instrumentation can find use as a versatile and rapid probe for tracing various types of surface active molecules. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8069
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 47, N° 1/2010 (01-02/2010) . - p. 40-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011905 - Périodique Bibliothèque principale Documentaires Disponible On Plate Resolution and Identification of Three-Component Mixture of Nonionic Surfactants / A. Mohammad in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 2/2009 (02-03/2009)
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Titre : On Plate Resolution and Identification of Three-Component Mixture of Nonionic Surfactants Type de document : texte imprimé Auteurs : A. Mohammad, Auteur ; S. A. Bhawani, Auteur Année de publication : 2009 Article en page(s) : p. 81-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie sur couches minces
SurfactantsTags : Chromatographie couches minces Surfactants non-ioniques Triton X-100 Brij-57 Brij-78 Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Silica gel 60 F254 plates were used with mixed aqueous-organic solvent systems consisting of dioxan and lithium chloride for the chromatography of three nonionic surfactants. The resolution of coexisting Triton X-100, Brij-57 and Brij-78 was achieved with the solvent system 1,4-dioxan : 1% aqueous LiCl (40 : 60, v/v). The effect of concentration of Li+ ions in the solvent system on the mobility of the three surfactants was studied. The interference on the resolution of the mixture of Triton X-100, Brij-57 and Brij-78, due to the presence of metal cations as impurities, is also examined. The limits of detection of Triton X-100, Brij-57 and Brij-78 estimated were 0.075, 0.150 and 0.20 µg/zone respectively. The practical applicability of proposed method was tested for the identification of three coexisting nonionic surfactants after their separation from the spiked aqueous systems. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4575
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 2/2009 (02-03/2009) . - p. 81-84[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011181 - Périodique Bibliothèque principale Documentaires Disponible