a glass stirred cell reactor with a plane horizontal gas-liquid interface was used for the absorption studies(see vaidya and mahajani (21) the mainadvantage of the stirred cell is that the rates of ababsorption can be measured using a liquid with a single, known compositionthis easy-to-use experimental device (inner diameter 97 mm, height 187 mm) was operated batchwise the total volume of the reaction was 1.45 dm3 and the interfacial surface area was 7.5x10-3m2. the reactor was equipped with a flange made of stainless steel (sharad autoclave engineers, mumbai) a pressure transducer (sharad autoclave engineers,mumbai) a pressure transducer (trans instruments,UK,0-1 bar ) mounted on this flange, coupled with a data acquisition system,enabled measurement of the total pressure inside the reactor the uncertainty in measuring pressure was +_ mbar the reactor was also equipped with inled and outled ports for gas and liquid the entire asssembly was proven to have no leak the setup was supplied by a variable speed magnetic drive (premex instruments,switzerland) the gas and liquid were stirred by two impellers, which were mounted on the same shaft the speed of stirring could be adjusted to the desred value with an accuracy of +_ rpm the impeller speed during kinetic measurements was limited to 120 rpm to ensure thet the gas-liquid interface was undisturbed the reactor was immersed in a water bath to ensure isothermal conditions the temperature was adjusted to the desired value with an accuracy of +- 0.1 C ., the solute gas was passed through a coil, which was also kept in water bath, before being charged inside the reaction the solubility of the solute in the liquid phase we used this contactor to measure the solubility of N2O in the activated DEEA solutions, too.