A novel rotated disc electrode and time lag method for characterizing mass transport in liquid-membrane systems
✍ Scribed by David A. Gough; John K. Leypoldt
- Publisher
- American Institute of Chemical Engineers
- Year
- 1980
- Tongue
- English
- Weight
- 741 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0001-1541
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✦ Synopsis
Abstract
A time lag method is described for use with a membrane‐covered, rotated disc electrode that allows determination of the partitioning and diffusivity of small molecules in hydrophilic gel membranes and membrane permeability from a single measurement. This new technique takes into account the concentration boundary layer in the solution adjacent to the membrane and reaction at the electrode surface of solutes that are diffusion‐ or kinetic‐limited. Examples are given of the use of this method for characterizing mass transfer in a commercial cellulosic membrane with oxygen, hydroquinone, ferrocyanide, and glucose as solutes.