Abstract
Gum arabic (GA) was esterified using octenylsuccinic anhydride (OSA) in an aqueous solution. HPLC was used to analyze the bound OS content (%OS) after esterification, and total OS content (%OStotal) results from HPLC were in agreement with titration results. The effects of temperature, reaction time, pH value, and GA concentration on the %OS value were determined using single factor experiments. Temperature, time, and pH were used for further optimization. Process parameters for preparation of octenylsuccinic anhydride modified gum arabic (OS-GA) were optimized using response surface methodology (RSM). The theoretical optimum conditions were a temperature of 37.9°C, a reaction time of 116.4 min, and a pH of the reaction system=7.99. Under optimum conditions, the %OS value of OS-GA was 2.07%.
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