The model for the scattering amplitudes is applied to a quantitative analysis of the scattering spectra of the n-block copolymer systems. The method allows interpretation of the X-ray diffraction patterns in systems of the multiblock copolymers forming multiply continuous triply periodic structures (MCTPS). We give simple formulas for the scattering intensity for structures of different topology and symmetry appearing in block copolymers. The straightforward fitting procedure presented in this article allows determination of the multicontinuous architecture adopted by a multiblock copolymer system, the volume fractions of the continuous domains and the width of the interdomain intefaces. The model is robust, i.e., applicable to n-block linear copolymers, and should be helpful in the quantitative analysis of the experimental data.