Ionic liquids are salts that are liquid at near ambient temperature, and they have many applications as process and performance chemicals.
They are seen as green solvents due to their negligible vapor pressures so they are important in green chemistry and clean technology. They also possess unique properties, such as a very wide liquidus range, tunable solvating power, and high thermal stability. They have a wide range of applications in fields as diverse as petrochemicals, fine chemicals, pharmaceuticals, biotechnology, hydrometallurgy, environmental remediation and nuclear sciences.
Measuring the solubility and diffusivity of gases and vapors in ionic liquids is crucial for many of these applications but understanding the thermodynamics is also of fundamental interest. These measurements can be performed over a range of pressures using the gravimetric technique. Instruments from the IGA and IGAsorp series have been used in a number of studies on these materials, including the investigation of water, carbon dioxide and hydrofluorocarbon sorption. The XEMIS sorption microbalance extends both the range of species and pressures that can be studied.