Fig. 1a and b shows the chromatograms of the light scattering (LS) response at 90°, ultraviolet (UV) and differential refractive index (DRI) signals of purified water-extracted EHF and MHF pectins as a function of the elution volume (mL). The DRI signal is proportional to the concentration of the polymer, whereas the LS signal depends on the size, Mw and concentration of the pectin molecules eluted through the column.