Universität zu Köln

Laupheimer, Michaela and Stubenrauch, Cosima (2014). Transmission Measurements as Tool to Study Phase Transitions of Liquid Mixtures. Tenside Surfactants Deterg., 51 (1). S. 17 - 26. MUNICH: CARL HANSER VERLAG. ISSN 0932-3414

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Abstract

We present a quantitative method to determine the phase transition temperatures between one-phase and two-phase regions of multi-component liquid mixtures via temperature-dependent transmission measurements with an UV/Vis spectrometer. The method is based on the fact that multi-phase samples are turbid, while one-phase samples are transparent. We describe the method in detail and discuss the choice of the experimental parameters (wavelength, sample layer thickness), a suitable temperature program as well as the data analysis. We prove the validity of our method by measuring the phase diagrams of two model systems, namely a liquid and a gelled nnicroemulsion. The results are in good agreement with those obtained with the conventional visual method used for phase studies.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Laupheimer, Michaela UNSPECIFIED UNSPECIFIED UNSPECIFIED Stubenrauch, Cosima UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-450602
DOI:	10.3139/113.110281
Journal or Publication Title:	Tenside Surfactants Deterg.
Volume:	51
Number:	1
Page Range:	S. 17 - 26
Date:	2014
Publisher:	CARL HANSER VERLAG
Place of Publication:	MUNICH
ISSN:	0932-3414
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GELLED POLYMERIZABLE MICROEMULSIONS; BEHAVIOR; APPARATUS Multiple languages Chemistry, Applied; Chemistry, Physical; Engineering, Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/45060