Analyze Published FPR Data By Hand
The figure below comes from one of our papers (Macromolecules 2004, 37 (12), 47314735). It highlights one of the neatest features of FPR: it takes TINY amounts of
material to do it. Each of these fractions was taken from the output of a GPC column.
A) Analyze these three plots graphically to get the diffusion coefficient for each
fraction assuming K = 405.3 cm-1.
B) Plot D vs. M and comment on the scaling law exponent (yes, it’s ONLY three
points, but that will do for a problem set).
C) If the spatial frequency K were incorrect, what effect would that have on the
measured slope in part B?
D) Assuming equivalence of mutual and self diffusion, what would be the correlation
time (electric field autocorrelation function, please!) in a dynamic light scattering
experiment performed on Fraction 4 in water (n = 1.33) using laser wavelength
532 nm and scattering angle  = 90°?