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    For the first time, stepwise pH gradient thin-layer chromatograms of biologically active substances with controlled developing solvent velocity are presented and described in the paper. Change in buffer pH of the mobile phase solution influences retardation, selectivity, and shape of the separated substances' spots. The conducted research has confirmed that the mobile phase's pH gradient could be an essential factor to optimize the conditions of the separation of substances in reversed-phase high-performance thin-layer chromatography. The reproducibility of the gradient retardation factor values of separated substance zones is satisfactory. Copyright © 2021 Elsevier B.V. All rights reserved.

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    Aneta Hałka-Grysińska, Adrian Szczyrba, Tadeusz H Dzido, Roman Kaliszan. Reversed-phase pH gradient thin-layer chromatography of biologically active substances with controlled developing solvent velocity. Journal of chromatography. A. 2021 Jul 19;1649:462224

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    PMID: 34038787

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