The determination of density and concentration of aqueous solutions of salts by optical way (lithium bromide as an example)

The results of investigation into a technique for determination of density and concentration of aqueous solutions of salts through a lithium bromide solution as an example have been presented, using changes of a refractive index that depend on solution density. Refractive index values for LiBr solution depending on concentration and temperature for monochromatic radiation at wavelengths of 660 and 532 nm were obtained.