Application of the indirect transform method to obtaining distance distribution functions of extremely large colloids and emulsions using small-angle X-ray scattering data obtained with a Bonse-Hart instrument

The indirect Fourier transform method for obtaining distance distribution functions and associated parameters from small-angle X-ray scattering data was adapted for studies of particles having radii of gyration up to 35000 Å and distance distribution functions extending up to 150 000 Å. Data were collected with a Bonse-Hart instrument. Distance distribution functions were obtained for materials of interest to petroleum production, including a powdered wax, a powdered asphaltene, a crude oil, and emulsions of dilute aqueous solutions of a partially hydrolyzed polyacrylamide polymer shaken with organic solvents.