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Herbal medicine physical quality evaluation by thermal analysis using adapted Ozawa method

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Abstract

The aim of this study was to evaluate the physical quality of Tabebuia caraiba (Mart.) Bur. powder, separately in three batches of different particle sizes, through the adapted Ozawa method. The Ozawa model was used for thermogravimetry (TG) data analysis in dynamic synthetic air and nitrogen atmospheres in different heating rates (5, 10, 20 and 40 °C min−1). The software TA-50 was used to data treatment. Kinetic data showed different values of activation energy and same reaction order according to the particle powder sample size in a specific model (derivative or tangent) of data treatment. The difference factor (F 1) was used to compare the parallelism line of the samples constructed by Ozawa graphs. Different kinetic results discriminate the particles size of the samples. TG technique allowed discriminating different particle sizes of herbal medicine powder.

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Acknowledgements

To CNPq, for financial support.

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Authors and Affiliations

  1. Department of Pharmaceutical Sciences, Federal University of Pernambuco, Recife, PE, Brazil

    Lidiane P. Correia, José V. V. Procópio & Rui O. Macêdo

  2. Department of Pharmaceutical Sciences, Medicine Development and Assays Unified Laboratories, Federal University of Paraíba, João Pessoa, PB, Brazil

    Márcia F. Pinto, Elisana A. Moura, Ana F. O. Santos & Rui O. Macêdo

  3. Pharmacy Department, State University of Paraíba, Campina Grande, PB, Brazil

    Lidiane P. Correia & Cleildo P. Santana

Authors
  1. Lidiane P. Correia
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  2. José V. V. Procópio
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  3. Cleildo P. Santana
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  4. Márcia F. Pinto
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  5. Elisana A. Moura
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  6. Ana F. O. Santos
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  7. Rui O. Macêdo
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Correspondence to Lidiane P. Correia.

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Correia, L.P., Procópio, J.V.V., Santana, C.P. et al. Herbal medicine physical quality evaluation by thermal analysis using adapted Ozawa method. J Therm Anal Calorim 122, 207–214 (2015). https://doi.org/10.1007/s10973-015-4638-5

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  • DOI: https://doi.org/10.1007/s10973-015-4638-5

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