Treatment of Data General Equation and Zimm Plot

Treatment of Data General Equation and Zimm Plot 

When the particles are large enough to display angular dissymmetry, Eq. (9) is only valid when 0 = 0, as P(0) = 1 for the angle. The experimental scattering intensities can only be analyzed as a function of the observation angle as it is impossible to measure the scattered intensity at zero angle [9] 

This equation implies a double dependence of scattering intensities on concentration and observation angle [9]. By extrapolating the scattering data for each concentration to zero angle, the second virial coefficient, which is related to thermodynamic properties, may be measured [9,10,15-18], 

By extrapolating scattering data for each angle to zero concentration, the mean-square radius of gyration may be measured [9,10,15-18] 

The ratio (nl/nl) is the refractive index correction to the scattering volume [42], Equation (12) becomes the following expression [9]  

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