Effect of xanthan gum on physicochemical properties of grass pea (Lathyrus sativus) isolate stabilized oil-in-water emulsion

Ghorbanian, Fatemeh; Kochaki, Arash; Milani, Elnaz; Razavi, Seyed Mohammad Ali

Effect of xanthan gum on physicochemical properties of grass pea (Lathyrus sativus) isolate stabilized oil-in-water emulsion

Authors

Fatemeh Ghorbanian

Arash Kochaki

Elnaz Milani

Seyed Mohammad Ali Razavi

Abstract

The effect of xanthan gum (0-0.3%) on corn oil-in-water (pH=7) emulsions prepaired by 0.5% grass pea (Lathyrus sativus) protein isolate was studied. Particle size, PDI, zeta-potential, emulsion capacity, emulsion stability and creaming index of emulsions were measured inorder to find the effect of xanthan gum on the stability of emulsion. Results showed that increasing concentrations of gum caused depletion flocculation and thus increased the particle size but had no significant effect on the zeta potential. Study on creaming index, emulsion capacity and stability also showed that with increasing xanthan gum, emulsion capacity and stability increased, while, creaming index decreased. Therefore, after 28 days of storage at 4˚C, no changes were observed in the emulsions containing xanthan gum.

Keywords

Emulsion stability

Grass pea (Lathyrus sativus) protein isolated

xanthan gum