Preparation of sorbents for solid-phase extraction of salicylic acid from aqueous solutions

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Abstract

Salicylic acid and its derivatives are widely used in medicine and pharmacy as antipyretic, antirheumatic, anti-inflammatory and analgesic drugs for external and internal use. The development of methods for the quantitation of salicylic acid in multicomponent samples using selective methods of sample preparation is an important problem in quality drug control. The aim of the study was to obtain sorbents based on ethyl cellulose for solid-phase extraction of salicylic acid from aqueous solutions. As a result of the study, a method for obtaining a sorbent for solid-phase salicylic acid from aqueous solutions was proposed. The IR spectroscopy of the obtained sorbent samples did not establish significant structural differences between ethylcellulose and the obtained sorbents. Optimal concentrations of ethylcellulose and salicylic acid solutions in the reaction mixture for obtaining the sorbent with a maximum value of sorption capacity of 93.5 µg/g of sorbent were revealed. The method for the quantitation of salicylic acid from aqueous solutions with the use of the obtained sorbent was proposed. Metrological estimation of salicylic acid quantitation with the help of the obtained sorbent for solid-phase extraction was carried out.

About the authors

Maxim N. Kachalkin

Samara State Medical University

Author for correspondence.
Email: maxroso@yandex.ru

Department of Chemistry, Institute of Pharmacy

Russian Federation, Samara

Alexander V. Voronin

Samara State Medical University

Email: a.v.voronin@samsmu.ru

Pharmaceuticals Sciences, Associate Professor, Head of the Department of Chemistry, Institute of Pharmacy

Russian Federation, Samara

References

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Supplementary files

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2. Fig. 1. Scheme of obtaining of the ethylcellulose-based sorbent for solid-phase extraction of salicylic acid from aqueous solutions

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3. Fig. 2. IR-spectrum of ethylcellulose reference sample and sorbent sample No. 10

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4. Fig. 3. Sorption capacity distribution of ethylcellulose sorbents depending on the ethylcellulose concentration and salicylic acid concentration in the reaction mixture

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5. Fig. 4. Chromatograms of the salicylic acid reference sample (20 µg/ml aqueous solution); chromatographic conditions: flow rate 0.2 ml/min, eluents: purified water (a) and 0.1 mol/L sodium hydroxide solution (b)

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Copyright (c) 2021 Kachalkin M.N., Voronin A.V.

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