REFRACTOMETRIC METHOD FOR EVALUATION OF SOYBEAN PROTEIN SOLUBILITY

Abstract

During the manufacture of soybean meal a quick control is essential, so that simple and rapid methods, to enable an immediate decision to be made, are of value A simple and rapid method for estimating soybean protein solubility on the basis of changes in the refractive index of dilute potassium hydroxide solution extracts was tested and we found to be highly correlated with the usual protein solubility test in KOH (r = 0.9382). Determination of biophysical parameters instead of chemical indices has two great advantages: the methods are nonpolluting since they don’t use chemical substances, and the methods are very rapid.

Keywords

• soybean meal
• koh protein solubility
• refractive index