Practicable method for preparing and controlling aqueous solutions of potassium bromide with very precise hydratic density

: With a view to realization the conditions of ultrasedimentative isolation of plasma lipoproteins the correlation between density (d4), coefficient of light refraction (nD20) and concentration (0,72-2,77 mol/l) of aqueous KBr solutions were analyzed. The tendency of alteration in nD20 with the change of d4 of KBr solutions have a linear character and the regression line is presented by the equation: nD20 = 1,1783 + 0,1552. It could be concluded from the analysis that the hydratic density of KBr solutions could be rapidly and very precisely controlled via Abbe refractometer at 20 degrees C.