Determination of Density and Viscosity of Binary Mixtures of Water and Dimethyl Sulfoxide with 1-Ethyl-3-methylimidazolium Diethylphosphate [EtMelm](+)[Et2PO4](-) at Atmospheric Pressure

In this work, the densities and viscosities of 1-ethyl-3-methylimidazolium diethylphosphate ([EtMelm](+) [Et2PO4](-)) in binary mixtures with water and dimethyl sulfoxide (DMSO) at atmospheric pressure and temperatures between 293.15 and 373.15 K were determined. The properties were measured in a Stabinger densimeter-viscosimeter SVM 3000 model. In addition, a correlation of the viscosity data was made with a modification of the Grunberg and Nissan correlation, in which corrections for the interaction between the ionic liquid and the water, DMSO, or both were introduced. For the mixture H2O + ([EtMelm](+) [Et2PO4](-)), the %AARD is 13% with a maximum deviation (%max) of 49%; for the mixture DMSO + ([EtMeIm](+) [Et2PO4](-)), the %AARD is 9.5% and the %max is 49%.