Heat capacities for nine ionic liquids (IL) have been determined with the "three-step" method using two different differential scanning calorimeters (DSC). In addition, the heat capacities of these ionic liquids have been studied by the modulated-temperature differential scanning calorimetry (MDSC (TM)). The measurements cover a temperature range from 315 to 425 K. (c) 2006 Elsevier B.V. All rights reserved.