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Differential electrolytic potentiometric determination of caffeine in nonaqueous media
Author(s) -
Abdennabi Abdalla M. S.,
Sultan Salah M.
Publication year - 1993
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140050814
Subject(s) - potentiometric titration , caffeine , chemistry , electrolyte , titration , acetic anhydride , toluene , electroanalytical method , electrode , antimony , inorganic chemistry , chromatography , organic chemistry , catalysis , medicine , endocrinology
The application of direct current differential electrolytic potentiometry (dc DEP) to the titration of caffeine in acetic anhydride‐toluene mixture has been investigated. A very stable low current source has been constructed to polarize the antimony electrodes. The behavior of these electrodes during the titration of caffeine has been examined. Caffeine in commercial samples like tea, Pepsi as a beverage and Prontopyrin, a proprietary drug, was extracted in chloroform and determined by dc DEP.