ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
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vol 62 / April, 2019
Article

DOI 10.17586/0021-3454-2015-58-6-473-477

UDC 535.324.2

MONITORING OF OPTICAL PROPERTIES OF CARBAMIDE AQUEOUS SOLUTIONS WITH THE USE OF INDUSTRIAL REFRACTOMETRY

V. . Artemiev
St. Petersburg State University of Information Technologies, Mechanics and Optics; Associate professor


N. P. Belov
ITMO University, Saint Petersburg, 197101, Russian Federation; engineer


S. N. Lapshov
ITMO University, Department of Solid State Optoelectronics; Assistant Lecturer


A. V. Smirnov
“Technocon Ltd.”; Deputy Director General


A. S. Sherstobitova
ITMO University, Saint Petersburg, 197101, Russian Federation ; Associate professor


A. D. Yaskov
ITMO University, Saint Petersburg, 197101, Russian Federation ; Professor


P. V. Odnovorchenko
ITMO University, Saint Petersburg, 197101, Russian Federation; Student


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Abstract. Concentration and temperature dependences of the refractive index, n(md, t), of carbamide aqueous solutions, as well as the index temperature factor, dn/dt , are measured. Industrial model of refractometer designed for monitoring of concentration of carbamide aqueous solutions in production line, and programmable method of the refractometer adjustment and calibration are described. Interpolation expressions for the refractive index ad its temperature coefficient are derived. Results of numerical simulation of short-wave absorption spectra are presented.
Keywords: carbamide, refractive index, temperature factor of refractive index, industrial refractometry