A NEW VARIABLE-TEMPERATURE AND PRESSURE INFRARED CELL TO STUDY LIQUIDAND LIQUID-GAS SYSTEMS

A new general purpose high pressure infrared cell has been built, whic h allows one to work up to 2000 bar pressure with gas, liquid or super critical fluid samples, in the temperature range from -70 degrees C to +150 degrees C. The optical pathway can be varied from ca. 0.1 to 4 m m, the different windows (CaF2, sapphire, diamond) allow measurements in a very wide (MR, IR and far IR) spectral region (both to be set bef ore pressurisation). Sample holders are built from PTFE, PCTFE or Vesp el to avoid any unwanted metal catalysis of the reactions studied at h igh pressures. Mixing facilities assure rapid solubility equilibrium i n gas-liquid systems. (C) 1998 Elsevier Science B.V.