Characteristics of Virgin Coconut Oil Emulsion with Honey and Citric Acid

Abstract

The present research was conducted aiming to examine the physical and chemical properties along with the stability of the emulsion of Virgin Coconut Oil (VCO) as an alternative product to decrease the oily taste when consuming the oil directly. The VCO emulsion involved in this research contains honey and citric acid with the ratio prepared of VCO : water : honey : is 80 : 18 : 2. Furthermore, the combination of emulsifiers of Tween 80 and Span 80 was also used at the ratio of 2 : 3, particularly at 0.75% concentration, while the citric acid was prepared in various amount including 0.02, 0.04, 0.06, 0.08 and 0.1 gram in every 100 ml emulsion. As a range of citric acid was provided in the research, it was found that as the citric acid amount increased, the viscosity and pH of emulsions decreased. Stable emulsion was obtained at citric acid amount of 0.02 to 0.06 gr / 100 ml emulsion. As much as 2.6 to 2.9 meq/kg sample of peroxide and 0.07 to 0.09 % fatty acid were obtained, indicating that the emulsion produced was not rancid. Meanwhile, regarding the laurat acid contained, the amount contained was 49.22% which is still suitable as APCC standard for VCO.

Functional Properties of Emulsified Honey–Vegetable Oil Mixtures

“…With Tween 80 as the emulsifier, Sahlan et al 20 prepared honey− vegetable oil emulsions that were stable for only eight weeks. In another study, 21 a combination of Tween 80 and Span 80 was used to stabilize honey−vegetable oil emulsions. The viscosity of these emulsions was tuned with citric acid to improve their stability to creaming.…”

“…The viscosity of these emulsions was tuned with citric acid to improve their stability to creaming. 21 Compared with surfactants, Sahlan et al 22 used lecithin to stabilize honey− vegetable oil emulsions containing an oil fraction between 0.075 and 0.15 for one year without phase separation. Stable honey−vegetable oil emulsions with a high fraction of vegetable oil (say 0.5) can be obtained from colloidal particles, but this is yet to be investigated.…”