Measurement of the evaporation rate of liquid in a shaking flask |
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| Affiliation: | 1. Department of Chemical Engineering, University of the Basque Country UPV/EHU, P.O. Box 644, E48080 Bilbao, Spain;2. Novattia Desarrollos, Ltd., Scientific and Technologic Park of Bizkaia, Astondo Bidea, Building 612, E48160 Derio, Spain;1. Istituto di Scienze e Tecnologie Molecolari (CNR-ISTM), C. Golgi 19, 20133 Milano, Italy;2. Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia;3. Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia;4. Budker Institute of Nuclear Physics, Lavrentieva 11, Novosibirsk 630090, Russia |
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| Abstract: | The evaporation rate (NH2O) of liquid in a shaking flask was measured under various shaking conditions: temperature, humidity, flask shape, liquid volume in the flask (VL), length of the stopper in the flask neck (LC), rotational speed of the shaker (N), and wind velocity (VW). The rate was significantly affected by these factors, and the existence of a distribution of water vapor pressure was suggested inside and outside the flask. To predict the evaporation rate, the following empirical equation was derived by the least squares method: NH2O=1.26×10−2SF1.18LF−1.3 (ps–p)1.24VL0.11N0.05VW0.26LC−0.37 where, SF is the cross-sectional area of flask neck, LF is the length of flask neck, ps is the saturated partial pressure of water vapor at the temperature of the air surrounding the flask, and p is the partial pressure of water vapor in the flask. |
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