The raw material plantago psyllium mucilage was obtained from its husk (The Sidhpur Sat-Isabgol Factory, Gujurat, India) and it was used after purification. Its purification was carried out by precipitation from aqueous solution with alcohol and it was finally washed with acetone and dried. The FTIR spectrum of purified mucilage was recorded on Brucker-vector-22 spectrophotometer. The viscosity of the polymer solution was measured by Ostwald viscometer. The intrinsic viscosity was obtained (from the point of intersection) after extrapolation of two plots, i.e. ηsp/C vs. C and ln ηrel/ C vs. C to zero concentration. Here, C is the concentration of polymer in g/dL and ηsp/C= ηrel-1/C, where η = η/ η = t / t ; t, being time of flow of polyrel 0 0 mer solution (of viscosity η), t , the time of flow of solvents (of viscosity η ) at the time of measurements.