Spectrophotometric determination of thioctic (α-lipoic) acid in water and pharmaceutical preparations
Korićanac Zagorka, Čakar Mira, Tanasković Slađana and 1 more
Journal of the Serbian Chemical Society · 2007
doi:10.2298/jsc0701029k (opens in a new tab)
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Abstract
A spectrophotometric method is described for the assay of thioctic acid. The method is based on the reaction between the drug and palladium(II) chloride. In this reaction, a yellow-colored, water soluble product with a 1:1 stoichiometric ratio and an absorption maximum at 365 nm was formed. The stability of the formed complex depends on various factors (pH, reaction time, concentration of reagents, ionic strength). Based on these findings, a new method is suggested for the spectrophotometric determination of thioctic acid in pharmaceutical formulations. This method is simple, sensitive and reproducible..
Abstract licence: CC BY
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