Trying to find the proper C0 value for the equilibrium angle of 40 is much more difficult since values less than ~0.010 result in barely decreasing trends. It seems to be parabolic when C0>proper C0 and fairly negligible below.
Using values of C0 higher than the proper value, I extrapolated (via quadratic approximation) the ideal C0 term which minimized the error in total Sr amount in the system. Now with 3 data points of C0 vs eq angle, I used another quadratic approximation to determine C0 vs equilibrium contact angle.
I’m thinking that if am to determine the proper expressions for remaining parameters (which may or may not have quadratic solutions) it will take significantly longer. May want to redirect efforts to something more fruitful?