Food Science and Technology (Campinas)
versão On-line ISSN 1678-457X
PAES, Sabrina S.; MATSUI, Kátia N.; LAROTONDA, Fábio D. S. e LAURINDO, João B.. A simple device for on-line determinations of liquid density and suspension concentration. Ciênc. Tecnol. Aliment. [online]. 2004, vol.24, n.2, pp. 261-264. ISSN 1678-457X. http://dx.doi.org/10.1590/S0101-20612004000200017.
A simple device was developed to determinate simultaneously the density and the concentration of particle suspensions. Cassava starch suspensions were used as a model to carry out the experiments and to develop the equipment. The determinations were based on the measure of the force suffered by a spherical plastic buoy immersed in the suspension under study. This force was transmitted to a force measure electronic cell by means of a metal stem. The experimental results showed that the device developed is a very good densimeter, which can be used to determine suspension concentration with good accuracy, when the relation between density and suspension concentration is known. Results of glycerin and a commercial soy oil density measures were in good agreement with the ones obtained in the literature and by picnometry technique, respectively.
Palavras-chave : particles; suspension; density; concentration; force; measure.