Densities of carbon dioxide loaded (partially carbonated), aqueous diethanolamine (DEA) solutions and aqueous methyldiethanolamine (MDEA) solutions are measured within a temperature range from (293.15 to 423.15) K. The series of DEA and MDEA aqueous solutions cover a range of amine mass ratios from (0.5 to 0.8) and a range of CO2 loading from (0 to 0.5) mol CO2 center dot mol amine(-1). All of the data points are compared with the predictions of the model from Weiland et al., and data regression is performed to fit selected parameters of the model. Predictions from the model fitted in this work are compared with the data measured in this work. The capability of carbonated aqueous DEA and MDEA solutions with amine mass ratios the fitted model to predict the densities of the partially different from what is used in this work is analyzed.