Comparación entre electrodos POSAI y electrodos comerciales en la titulación potenciométrica de sulfametoxazol y trimetoprima.
2012
The POSAI electrodes (electrode made with ferric and ferrose oxides films over stainless steel) and commercial
electrodes were compared in the potenciometric titration of sulfamethoxazole and trimethoprim included in
Bactrim antibiotic. Trimethoprim determination was carried out by the acid�base reaction on non-aqueous
medium with perchloric acid, while the sulfamethoxazole determination was made with sodium nitrite in a redox
reaction. The use of prototype electrode platinum/POSAI by redox reaction, and the prototype electrode POSAI
as reference electrode in an acid-base reaction, was similar to the use of platinum/Ag/AgCl electrode and the
use of commercial electrode respectively, due to the equivalency in the results founded in the
micropotenciometric titration employing such electrodes.
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