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The purpose of this study was to investigate the effect of extraction and application of okra gum as an aqueous film coating agent. Powdered okra pods dispersed in demineralized water was heated at 80 ± 2(o)C for 30 minutes in the presence of sodium chloride. The filtrate was successively centrifuged at 4000 rpm for 30, 60, or 120 minutes and freeze dried. The samples were used as film former at different concentrations in aqueous film coating operations. Near infrared (nIR) absorption spectra, photomicrographs, and some physicochemical properties of the coated tablets were evaluated. The okra gum samples had different nIR spectra and possessed good processing and application quality due to relatively low viscosity. A six-fold concentration of this gum from the novel extraction yielded glossy theophylline tablets within a short time. A t (18) = 2.895, P &lt; 0.005, t critical = 1.734 were obtained for the independent analysis of the hardness of core and coated theophylline tablets. A 3.0% concentration of the okra samples at a flow rate of 3 ml/min for 100 minutes showed that F = 3.798, DF = 29, P &lt; 0.035, F critical = 3.354 in tablet hardness among samples and F = 15.632, DF = 29, P &lt; 0.0001, F critical = 2.152 were obtained on film thickness among tablet samples during the coating and drying operation. Novel extraction process enhanced the film coating potential of okra gum by delivering more solids on the substrate at a shorter time with improved operation efficiency.

Novel extraction and application of okra gum as a film coating agent using theophylline as a model drug