Possibility of using a carbon dioxide laser in determination of the concentration of solutions

A study was made of the dependence of the relative reflection of the λ = 10.6 μ radiation on the concentration of aqueous solutions of salts, alkalis, and acids. The experimentally determined intensity of reflection from the surface of a solution was found to be in one-to-one correspondence with the concentration. This method could be used in long-distance measurement of the concentration of solutions including aggressive substances and in long-distance probing of water basins.