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Published on: December 13, 2019
Volume fraction determination of binary liquid mixtures by measurement of the equalization wavelength
Ivan Martincek1, Dusan Pudis, Daniel Kacik
1Department of Physics, University of Žilina, Univerzitná 1, SK- 01026, Žilina, Slovakia. ivmar@fel.uniza.sk
Abstract:
A method for determination of the volume fraction in binary liquid mixtures by measurement of the equalization wavelength of intermodal interference of modes LP(01) and LP(11) in a liquid core optical fiber is presented in this paper. This method was studied using a liquid core optical fiber with fused silica cladding and a core made up of a binary silicon oil/chloroform liquid mixture with different volume fractions of chloroform. The interference technique used allows us to determine the chloroform volume fraction in the binary mixture with accuracy better than 0.1%. One of the most attractive advantages of presented method is very small volume of investigated mixture needed, as only a few hundred picoliters are necessary for reliable results.
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