EXPERIMENTAL STUDY OF THE ELECTRICAL DOUBLE LAYER IN VERY DILUTE AQUEOUS SOLUTIONS.
Abstract
Two methods are described for the measurement of the double layer differential capacity in media of low conductivity, i.e. under conditions in which the conventional bridge method fails: (a) measurement of the change of potential caused by coulostatic charging with a small excursion of potential; (b) determination, under coulostatic conditions, of the time constant of the circuit comprising the double layer capacity in series with a large resistance. The first method is definitely the more convenient and slightly more accurate. Application is made to 0.001 to 0.00001 M sodium fluoride, and results agree with those calculated from the Gouy-Chapman theory for Grahame's capacities of the compact double layer. The coulostatic method is compared with the bridge method and some potential applications are mentioned. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1966
- Accession Number
- AD0631625
Entities
People
- Anna-maria Giuliani
- Paul Delahay
- Robert De Levie
Organizations
- Louisiana State University