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The Effect of Prime Emulsion Components As a Function of Equilibrium Headspace Concentration of Soursop Flavor Compounds

Cheong, KW; Tan, CP; Mirhosseini, H; Joanne-Kam, WY; Hamid, NSA; Osman, A; Basri, M
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http://hdl.handle.net/10292/10012
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Abstract
Background: Perceptions of food products start when flavor compounds are released from foods, transported and

appropriate senses in the oral and nose are triggered. However, the long-term stability of flavor compounds in food

product has been a major concern in the food industry due to the complex interactions between key food ingredients

(e.g., polysaccharides and proteins). Hence, this study was conducted to formulate emulsion-based beverage using

natural food emulsifiers and to understand the interactions between emulsion compositions and flavor compounds.

Results: The influences of modified starch (x1), whey protein isolate (x2), soursop flavor oil (x3) and deionized water (x4)

on the equilibrium headspace concentration of soursop volatile flavor compounds were evaluated using a

four-component with constrained extreme vertices mixture design. The results indicated that the equilibrium headspace

concentration of soursop flavor compounds were significantly (p < 0.05) influenced by the matrix and structural

compositions of the beverage emulsions. Interface formed using modified starch and whey protein isolate (WPI)

proved to be capable of inhibiting the release of volatile flavor compounds from the oil to the aqueous phase.

Modified starch could retard the overall flavor release through its hydrophobic interactions with volatile flavor

compounds and viscosity enhancement effect. Excessive amount of modified starch was also shown to be detrimental

to the stability of emulsion system. However, both modified starch and WPI showed to be a much more effective

barrier in inhibiting the flavor release of flavor compounds when used as individual emulsifier than as a mixture.

Conclusions: Overall, the mixture design can be practical in elucidating the complex interactions between key food

components and volatile flavor compounds in an emulsion system. These studies will be useful for the manufacturers for

the formulation of an optimum beverage emulsion with desirable emulsion properties and desirable flavor release profile.
Keywords
Mixture design; Modified starch; Whey protein isolate; Soursop beverage emulsion; Polysaccharide-protein interactions
Date
2014
Source
Chemistry Central Journal, vol.8, pp.23 - 23
Item Type
Journal Article
Publisher
SpringerOpen
DOI
10.1186/1752-153X-8-23
Publisher's Version
http://dx.doi.org/10.1186/1752-153X-8-23
Rights Statement
© Cheong et al.; licensee Chemistry Central Ltd. 2014 This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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