Herein, we present a convenient method for quantitative spectrophotometric determination of citrate ions in aqueous solutions in the middle-UV range. It involves measuring the absorbance of citric acid at 209 nm under suppressed dissociation at pH < 1.0 in the presence of hydrochloric acid. Validation of the method was performed according to the guidelines of the International Conference on Harmonization. A very good linear dependence of the absorbance on concentration (r = 0.9999) was obtained in a citrate concentration range of 0.5-5.0 mmol/L. This method is characterized by excellent precision and accuracy; the coefficient of variation in each case is below the maximal permissible value (%RSD < 2). The proposed analytical procedure has been successfully applied to the determination of citrates in oral electrolyte formulations.
W artykule przedstawiono fizjologiczne role jonów cytrynianowych, ich złożony udział w procesach metabolicznych oraz lokalizację w komórkach ludzkiego organizmu. Ponadto opisano zastosowania terapeutyczne, także te, które obecnie są w fazie testów. Stosunkowo nowym kierunkiem badań jest wykorzystanie cytrynianów w dziedzinie inżynierii biomateriałowej, otwierające nowe możliwości zastosowań w medycynie i farmacji.
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