Method A: The solubility cell is placed in a metal block surrounded by a cooling coil supplied by liquid nitrogen. Septum stoppers at the top and bottom permit sampling of the solution by means of a pressure microsyringe. The cell is initially charged with 2.5 cm3 of solvent which is then saturated with gas by bubbling through a distribution ring containing 0.1 mm holes. The gas is continuously released through a pressure controlling manometer. The temperature is measured by miniature thermocouple. Analysis is by gas chromatography.Method B: Apart from the explanation that a static method was used, no further description is provided.