Transmission Measurements as Tool to Study Phase Transitions of Liquid Mixtures
2014 (English)In: Tenside Surfactants Detergents, ISSN 0932-3414, Vol. 51, no 1, 17-25 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2014. Vol. 51, no 1, 17-25 p.
Phase boundaries, phase transition temperature, turbidity, transmission measurements, Microemulsions
IdentifiersURN: urn:nbn:se:kth:diva-144573DOI: 10.3139/113.110281ISI: 000332917800005ScopusID: 2-s2.0-84893969148OAI: oai:DiVA.org:kth-144573DiVA: diva2:713932
QC 201404242014-04-242014-04-242014-04-24Bibliographically approved