Abstract:
This research was aimed to extract pectin from pomelo peels by different solvents (hydrochloric solution, acetic acid solution, lime juice, sodium hydroxide solution and ashes solution) using microwave-assisted method, and evaluate properties and stability of polysaccharide in cosmetic formulation. The results revealed that use of 5% w/v acetic acid provided a highest yield and pectin content of 37.00±0.60% and 62.76±0.93%, respectively. Moreover, it also gave degree of esterification of 74.76±3.83%. Physico-chemical evaluation showed that the pectin from pomelo peel can be soluble in water and increase the viscosity of the aqueous solution as following the amount of pectin. Stability of serum containing 1.5% w/w of the pomelo pectin was evaluated as compared to the commercial pectins including lemon pectin and apple pectin. Changes in viscosity, pH and color were determined under heating/cooling with 4 cycles, as well as accelerated storage conditions at 45 ºC, 4 ºC and ambient temperature for 1 month. The results demonstrated that the all formulation performed similar results in which the viscosity was slightly decreased with a slight change of pH and color. This seemed to indicate a stability of products. Therefore, it can be confirmed that pectin from pomelo has a potential for development as a commercial ingredients. This could be a cost reduction of the commercial imported pectin and value added of the pomelo peels.