Wavelet Signal Processing Tools for Quantifying and Monitoring the invitro Dissolution Profiles of Tenofovir Disoproxil Fumarate and Emtricitabine in Tablets

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Dinç E., Özdemir A. N. , Üstündağ Ö., Bıyık E., Tilkan G., Hoang V. D.

Journal of Mexican Chemical Society, vol.66, no.4, pp.488-499, 2022 (SCI-Expanded)


Wavelet signal processing tools were applied to the UV spectral dataset for the quantification and understanding the in vitro dissolution behaviors of tenofovir disoproxil fumarate (TEN) and emtricitabine (EMT) in commercial tablets with low-cost and short analysis time. Preliminary signal analysis tests were staged to determine the most suitable wavelet family or families to monitor in vitro dissolution profiles and quantify the drugs of interest. Of these, Daubechies (db6), Symlets 3 (sym3), Biorthogonal 1.5 (bior1.5) and Coiflets 5 (coif5) continuous wavelet tools have been found to be optimal as they provide the desired results. Calibration curves obtained by regression analysis of the continuous wavelet signal (dependent variable) on concentration (independent variable) were found to be linear in the range of 4.0-52.0 µg/mL for both drugs. The validity of CWT signal processing tools was tested by analyzing mixtures made in the laboratory. The Quantitation of TEN and EMT by the proposed signal processing tools did not require a pre-separation procedure. They were successfully utilized for the assay and in vitro dissolution monitoring of the two drugs in their combined tablets. Consequently, the presented work provided alternative tools based on wavelet signal processing to traditional derivative spectrophotometry to resolve a two-component mixture without using a priori separation step