1996 Volume 43 Issue 10 Pages 1110-1116
The densities of three kinds of liquid food (milk, dry milk solution, coffee) of concentration between 5% to 40% (w/w) were measured at temperatures between 0°C to 60°C using a pycnometer. The results measured were applied to Alfred's equation and they agreed well with the calculation from the equation. The effects of concentration and temperature on the specific volume, which was the reciprocal of the density, were investigated. The specific volume was written as a function of both temperature and concentration. From this equation, coefficients of thermal expansion and shrinkage by the change of concentration were determined. On the basis of these results, the density was derived as a function of both temperature and concentration.
