Abstract

EFFECT OF PHYSICOCHEMICAL CONDITIONS ON RHEOLOGICAL PROPERTIES OF NATURAL HYDROCOLLOIDS

Ajay Kumar Sav and Purnima Dhanraj Amin

Abstract

In present study, effect of concentration, electrolyte and heating conditions were investigated for selected four types of hydrocolloids, namely fenugreek gum, guar gum and locust bean gum and Xanthan gum on their rheological properties. The results revealed that hydrocolloid concentration has profound effect on their viscosity; increase in concentration increases the viscosity correspondingly. The viscosity was follows the trend: GG>XG>LBG>FG. In presence of certain electrolyte, viscosity of Xanthan gum and galactomannan containing fenugreek gum, guar gum, locust bean reduced significantly. It indicates interaction between polysaccharide and ions. Hydrocolloids solubility and swellability increases on heating that led to increase in viscosity in case of galactomannan containing gum whereas xanthan gum lost its viscosity.

Keywords: Hydrocolloids, Fenugreek gum, Locust bean gum, Guar gum, Xanthan gum.