7 research outputs found
Measurement of Low Concentration of Nanosized Objects Suspended in a Liquid Medium
Publisher Copyright: © 2018 D. Merkulovs et al., published by Sciendo 2018.The new optical scheme of refractometer with temperature stabilisation 10-2 °C is developed, which allows measuring a refractive index of the sample with accuracy not worse than 10-5; dependence of refraction index on concentration of SiO2 nanoparticles in liquid suspension is obtained within the framework of the research.publishersversionPeer reviewe
Cylindrical Cell-Based Refractometers to Analyse Biomedical Liquids
Compact device of high sensitivity for measurement of the refractive indices of both stationary and flowing liquids has been developed. This device can be used to analyse a variety of biomedical liquids: urine, serum protein. The refractive index (RI) is determined by measuring the deviation of a laser beam passing through a cylindrical cell containing the test liquid. In order to significantly improve the resolution and stability of RI measurements, the repeated reflections and refractions of the light beam travelling through the cylindrical cell are employed