摘要：Citric acid is an organic acid produced by carbohydrates fermentation process under microorganisms' action. Its uses in a large variety of fields going from food products to cosmetics and medicines require a good knowledge of its industrial behavior. From this point of view, thermo-physical properties (density, viscosity, thermal heat capacity, thermal conductivity and so on) present a major interest. As consequence, in this paper, different mathematical relations between temperature and concentration and density and dynamic viscosity of aqueous solutions made of anhydrous citric acid were established. The known data were fitted in different equations in order to assess and select suitable mathematical models. Their accuracy was studied using several statistical analysis tools such as correlation coefficient, ANOVA test, relative error etc. Taking into consideration the level of precision and the simplicity of formulation, several equations were generated for each of the studied thermo-physical property. For density proposed model the correlation coefficient R 2 is 0.999 and the average relative errors is 0.03% (absolute value). The dynamic viscosity equation was based on the Arrhenius model with average relative errors of 0.59% (absolute value). All the obtained equations can be uploaded in computer software available both for industrial and academic users and successfully used to facilitate the sizing and the optimization calculations of various technological processes and equipment.
