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Effect of the Absorbance of a Flowing Liquid on the Error of the Refractive Index Measured with a Differential Refractometer

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Abstract

We determined the factors that affect the measurement error of the refractive index n in a flowing liquid (a change in its absorbance and temperature). When a flow-through differential refractometer is used to measure the refractive index of a flowing liquid, the error in measuring is additionally affected by the scattering of radiation in the cell converter and the wedge shape of the cell glasses. A new differential refractometer is developed designed for studying the effect of the absorbance of a flowing liquid on the measurement error of the refractive index. New results are obtained confirming this effect, and a new procedure for compensating it is proposed.

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Authors and Affiliations

  1. St. Petersburg Polytechnic University, 195251, St. Petersburg, Russia

    V. V. Davydov & A. V. Moroz

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  1. V. V. Davydov
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  2. A. V. Moroz
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Correspondence to V. V. Davydov.

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Translated by O. Zhukova

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Davydov, V.V., Moroz, A.V. Effect of the Absorbance of a Flowing Liquid on the Error of the Refractive Index Measured with a Differential Refractometer. Opt. Spectrosc. 128, 1415–1420 (2020). https://doi.org/10.1134/S0030400X20090076

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  • DOI: https://doi.org/10.1134/S0030400X20090076

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