Abstract: A suspension of a starch-containing product in heated during agitation, whereby the viscosity is registered as a function of the temperature. A curve over the relationship between viscosity an temperature is treated as a property profile for the sample and is compared with another known curve in order to determine the heating properties for the sample. A device for this analysis has an agitator (7), the drive means (10, 11) of which has a power sensor (12) for sensing the power which the agitator is subjected to during the agitating, whereby a measure of the viscosity is obtained. A temperature sensor (13) senses the temperature of the sample.