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On the Immersion Liquid Evaporation Method Based on the Dynamic Sweep of Magnitude of the Refractive Index of a Binary Liquid Mixture: A Case Study on Determining Mineral Particle Light Dispersion
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. Univ Oulu, Oulu Min Sch, Oulu, Finland.
Univ Oulu, Unit Measurement Technol MITY, Finland.
Univ Eastern Finland, Joensuu, Finland.
2017 (English)In: Applied Spectroscopy, ISSN 0003-7028, E-ISSN 1943-3530, Vol. 71, no 7, 1586-1592 p.Article in journal (Refereed) Published
Abstract [en]

This is a feasibility study of a modified immersion liquid technique for determining the refractive index of micro-sized particles. The practical challenge of the traditional liquid immersion method is to find or produce a suitable host liquid whose refractive index equals that of a solid particle. Usually, the immersion liquid method uses a set of immersion liquids with different refractive indices or continuously mixes two liquids with different refractive indices, e.g., using a pumping system. Here, the phenomenon of liquid evaporation has been utilized in defining the time-dependent refractive index variation of the host liquid. From the spectral transmittance data measured during the evaporation process, the refractive index of a solid particle in the host liquid can be determined as a function of the wavelength. The method was tested using calcium fluoride (CaF2) particles with an immersion liquid mixed from diethyl ether and diffusion pump fluid. The dispersion data obtained were consistent with the literature values thus indicating the proper functioning of the proposed procedure.

Place, publisher, year, edition, pages
2017. Vol. 71, no 7, 1586-1592 p.
Keyword [en]
Refractive index, light dispersion, liquid mixture, evaporation, modified immersion liquid method, solid particles
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-31348DOI: 10.1177/0003702817693237ISI: 000404688100020PubMedID: 28195502Scopus ID: 2-s2.0-85021732924OAI: oai:DiVA.org:miun-31348DiVA: diva2:1130218
Available from: 2017-08-08 Created: 2017-08-08 Last updated: 2017-08-11Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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