Plots for the Particle Scattering Factor

Various Plots for the Particle Scattering Factor a) The Zimm-Plot159) 

In every case the first two members in the power expansion of the particle-scattering factor in terms of q2 are given by 

Therefore, the Zimm-plot gives a family of parallel lines which appear shifted along the abscissa by the arbitrary constant k. These line can be extrapolated for each concentration to zero scattering angle, and for each angle an extrapolation to zero concentration can be carried out. This Zimm-plot finally results into the two limiting lines Kc/R0 c = 0 

Stockmayer and Casassa163 realized that for flexible coils this factor varies with the coil expansion but still the more general equation 

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