[A new spectral method for the determination of cationic surfactant based on the resonance scattering effect of AgI2- association particles].

In pH 3.5 NaAc-HCl medium, there is a maximum resonance scattering (RS) peak at 360 nm and a synchronous scattering peak at 470 nm for the association particle system of (CTMAB-AgI2)n in white color, with a diameter of 700 nm. The CTMAB concentration cCTMAB in the range of 2.