Coulometric titration methods with potentiometric indication of the end-point have been developed for determining benzoic, salicylic, nicotinic, and ascorbic acids in various pharmaceutical dosage forms, liniments, and aqueous alcohol solutions. The relative standard deviation was within 0.01–0.02.
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Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 43, No. 6, pp. 54–56, June, 2009.
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Abdullina, S.G., Lira, O.A., Ziyatdinova, G.K. et al. Controlled-potential coulometry for the analysis of carboxylic acids. Pharm Chem J 43, 360–362 (2009). https://doi.org/10.1007/s11094-009-0307-y
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DOI: https://doi.org/10.1007/s11094-009-0307-y