Abstract
The anodic behavior of natural purine alkaloids pertaining to the group of xanthine N-methyl derivatives is studied on the carbositall electrode in aqueous solutions of dilute acids. The conditions favorable for irreversible electrooxidation of these substances in the acidic medium are considered and the mechanism is discussed. The possibility of measuring defined oxidation peaks of these alkaloids by the background of ascorbic acid and paracetamol, which are the electrochemically active compounds often accompanying the studied substances in various drugs. The results of determination of theophylline and caffeine in certain drug formulations are given.
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