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An inexpensive, digital instrument for surface tension, interfacial tension, and density determination / Darren L. Williams in Industrial & engineering chemistry research, Vol. 47 n°12 (Juin 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°12 (Juin 2008) . - p. 4286–4289 Titre : An inexpensive, digital instrument for surface tension, interfacial tension, and density determination Type de document : texte imprimé Auteurs : Darren L. Williams, Auteur ; Casie L. Jupe, Auteur ; Karl D. Kuklenz, Auteur Année de publication : 2008 Article en page(s) : p. 4286–4289 Note générale : Bibliogr. p. 4289 Langues : Anglais (eng) Mots-clés : Digital  ring  tensiometer;  Carver  press;  Water-recirculation  bath Résumé : This article outlines the construction of a large-capacity, digital ring tensiometer, using common laboratory equipment, and reports the validation of this instrument against National Institutes of Science and Technology (NIST) data. A Carver press is used as a hydraulically controlled platform that raises and lowers the temperature-controlled jacketed flask that contains the test solutions. The upper platen of the press supports a four-decimal-place scale with a Pt−Ir ring hanging from the underscale hook. The scale measures the pull on the ring as the solution interface is lowered by the press. The force measurements are transferred to a personal computer (PC) via RS-232 communications. Temperature is controlled via a water-recirculation bath. The experimental surface tension measurements for toluene and water at 13 different temperatures were, on average, 2.7% larger than the NIST data. The 25 °C surface tension measurements for water, 2-butanone, ethyl ethanoate, and toluene were, on average, 1.1% larger than those calculated using the Hansen solubility parameters. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800211a [article] An inexpensive, digital instrument for surface tension, interfacial tension, and density determination [texte imprimé] / Darren L. Williams, Auteur ; Casie L. Jupe, Auteur ; Karl D. Kuklenz, Auteur . - 2008 . - p. 4286–4289. Bibliogr. p. 4289 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°12 (Juin 2008) . - p. 4286–4289 Mots-clés : Digital  ring  tensiometer;  Carver  press;  Water-recirculation  bath Résumé : This article outlines the construction of a large-capacity, digital ring tensiometer, using common laboratory equipment, and reports the validation of this instrument against National Institutes of Science and Technology (NIST) data. A Carver press is used as a hydraulically controlled platform that raises and lowers the temperature-controlled jacketed flask that contains the test solutions. The upper platen of the press supports a four-decimal-place scale with a Pt−Ir ring hanging from the underscale hook. The scale measures the pull on the ring as the solution interface is lowered by the press. The force measurements are transferred to a personal computer (PC) via RS-232 communications. Temperature is controlled via a water-recirculation bath. The experimental surface tension measurements for toluene and water at 13 different temperatures were, on average, 2.7% larger than the NIST data. The 25 °C surface tension measurements for water, 2-butanone, ethyl ethanoate, and toluene were, on average, 1.1% larger than those calculated using the Hansen solubility parameters. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800211a