Electricity: measuring and testing – Electrolyte properties – Using a ph determining device
Patent
1989-07-05
1991-05-14
Wieder, Kenneth
Electricity: measuring and testing
Electrolyte properties
Using a ph determining device
204405, 324446, G01N 2702
Patent
active
050159577
ABSTRACT:
An amperometric method for the direct measurement of acidity in a medium which contains at least one ester of an acid containing oxygen, and whose dielectric constant is lower than 30. The method provides for maintaining a constant voltage between an ultramicroelectrode and a counterelectrode and measuring the current therebetween as an increasing quantity of diphenylphosphoric acid is added to the medium via a microburette. The measured current being indicative of the acidity of the medium under test. A predetermined curve is provided which represents the relationship between the acidity of the medium and the current measured by the system.
REFERENCES:
patent: 3647641 (1962-03-01), Grubb
patent: 4406751 (1983-09-01), Blass et al.
MacFarlane et al., "Thin-Ring Ultra-Microelectrodes", J. Electroanal. Chem., 185 (12/1985), pp. 197-202.
Wang et al., "Anodic Stripping Voltammetry at Ultramicroelectrodes for Metal Speciation Studies in Aqueous Solutions of Low Ionic Strength", J. Electroanal. Chem., 246 (12/1988), pp. 297-305.
Bessiere Jacques
Perdicakis Michel
Electricite de France (Service National
Mueller Robert W.
Wieder Kenneth
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