Polarographic reduction of 2-arylazo2-bromo-5,5-dimethylcyclohexane-1,3-diones takes place in a single step involving two electrons. Well-defined, diffusion controlled, irreversible waves are obtained in the pH range 2.0 -11.0. The Ei,2 value shifts towards more negative potentials with increasing pH. Methyl, Methoxy, chloro, bromo and ethoxy groups show positive polarographic ortho shift (~o)....

UNLABELLED The aim of this work was to develop a selective method for quantification of Sn(II) and Sn(IV) in dimercaptosuccinic acid (DMSA), ethylcysteinate dimer (ECD), methylenediphosphonic acid (MDP), and pyrophosphate radiopharmaceutical cold kits by differential pulse polarography. METHODS A dripping mercury electrode 150 polarographic/stripping analyzer with a conventional 3-electrode c...

Sommary-_The polarographic reduction of hydrogen ion, furnished by dissociation of a Brransted acid or present in the undissociated Brsnsted acid, is reviewed for the situation where a solvent other than water is involved. INTRODUCTION THE electrochemical reduction of hydrogen ion in aqueous solution has long been a major problem in electrochemistry, as indicated by the voluminous literature on...

Irode reactions at the dropping mercury electrode and for kinetic polarographic currents was found and the solution derived with the help of dimensionless quantities. The interpolation formula for average kinetic polarographic currents is inagreement with experimentally found dependences on relevant parameters, and it has a form very similar to the older approximate equations of Brdi~kaand Wies...

The binding of T-1824 (Evans blue) with plasma has been extensively studied in the past by Allen and Orahovats (1) by means of the cellophane sorption method. Although this approach yielded excellent results, a simpler and more direct method seemed desirable. The basis for this new method is furnished by the observation, made in 1939,’ that the free T-1824 gives rise to a distinct polarographic...

Lansoprazole (LNS) and omeprazole (OMP) are therapeutically important drugs, and the need arose for a simple, reliable method for their content uniformity of their tablets. The anodic polarographic behavior of lansoprazole and omeprazole has been studied in Britton-Robinson buffer (BRb) over the pH range 4.1-11.5. In BRb of pH 7 well-defined anodic waves were produced with diffusion-current con...