Patent ID: 6542828
Filing Date: 2003-04-01
Classification: C23F,G01N

Abstract:
A method for determining the concentration of at least one acid or base in a complex solution, comprising the following steps:(a) measuring at least a first physical property value for the solution and a second physical property value for the solution, wherein the first physical property and the second physical property can be respectively defined in the form of a first solution property equation and a second solution property equation, wherein each equation expresses the respective physical property as a function of the concentration of one of the acids or bases; (b) inserting the measured physical property values into the respective solution property equations, wherein the equations each include at least two unknown quantities, one of which is the desired concentration of the acid or base; and (c) solving the solution property equations simultaneously, so as to determine the desired concentration of the acid or base; wherein a first physical property is selected from the group consisting of electrical conductivity, opacity, density, refractive index, electromagnetic wave transmission, electromagnetic wave absorption, fluidity, open potential of solution, sound velocity, and color; and the second physical property is selected from the group consisting of electrical conductivity, opacity, density, refractive index, electromagnetic wave transmission, electromagnetic wave absorption, fluidity, open potential of solution, sound velocity, and color.