Metrological Maintenance Developed for Refractometric Measurements Based on the Surface Plasmon Resonance

The results of metrological maintenance developed for refractometric measurements based on the surface plasmon resonance (SPR) are presented. Device and software for adjusting, calculating the angles of minimum of SPR curves, their visualization, and determining of the refractive index of the liquid in real time were developed. The results of State metrological certification (SMC) for measuring of the refractive index of liquids in the range 1,33…1,38 with a permissible absolute error less than 10-3 are showed. The device for refractometric measurements allows determine refractive index of liquids based on the SPR angle minimum registration of monochrome light reflectance from the sensory substrate at the wavelength of light 670 nm. The average angle of minimum is ued for the estiamation of the refractive index of 100 observations at a sample temperature 26 °С.