High-performance size exclusion chromatogram of the fibers extracted from potato pulp by simulated in vitro digestion (IVSF) and by using an established purification process (UFSF). *, 800 kDa; +, 400 kDa; #, 110 kDa; ¤, 12 kDa; §, 1.3 kDa. μRIU, refractive index unit; t, time.