Main Article Content
cellulose gum, emulsion size index, emulsion stability, guar gum, rheology
The potential of two functional hydrocolloids of guar gum (GG, 0.3-0.5%) and carboxymethyl cellulose (CMC, 0.2-0.4%) to design an optimum and stable formulation for corn oil-water emulsions was studied using response surface methodology. The physicochemical attributes including pH, turbidity, size index, apparent viscosity and physical stability as a function of two independent variables were investigated. The results showed that empirical second-order polynomial models with high R2 (>0.94) can be used to fit the experimental data. The best formulation (0.5% GG and 0.2% CMC) resulted in pH of 4.02, turbidity of 0.706, size index of 0.900, apparent viscosity of 996 cP and stability of 93.5%, and the models ensured a good fitting of the observed data. A highly positive correlation was found between viscosity and turbidity values (P<0.01; r2=0.977).
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