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. 2018 Jan 12;13:415–428. doi: 10.2147/IJN.S146346

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© 2018 Tian et al. This work is published and licensed by Dove Medical Press Limited

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The FTIR spectrum of (a) BH, (b) acid-Mt, (c) Mt-BH, (d) BMEM, (e) Eudragit RL100, and (f) Eudragit RS100.

Abbreviations: Acid-Mt, montmorillonite treated with acid; BH, betaxolol hydrochloride; BMEM, betaxolol hydrochloride encapsulated microsphere; FTIR, Fourier transform infrared; Mt, montmorillonite; Mt-BH, betaxolol hydrochloride loaded into montmorillonite.