A method for the determination of the ion concentration, specific gravity, or osmotic pressure of a solution, which comprises causing to contact a solution under test with a coloring substance formed of a pigment or a precursor of pigment having resolubility correlated with the ion concentration of said solution and detecting the solubility of said coloring substance in said solution, and an apparatus therefor.
一种测定溶液的离子浓度、比重或渗透压的方法,包括使被测溶液与由
颜料或
颜料前体形成的着色物质接触,该着色物质的溶解度与所述溶液的离子浓度相关,并检测所述着色物质在所述溶液中的溶解度,以及一种用于此的仪器。