Based on the Faraday magneto-optical Effect and the optically active principle of some materials,a optical method of detecting the concentration simultaneously of the two-Component solution,respectively is proposed by using quadrature AC magneto-optical modulation method.This approach requires that in the solution to have one and only one component with optical activity.By measuring the received light intensity and getting the rotation angle and the Verdet constant of each component Acorrding to the relatio...