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Journal of Thermal Analysis and Calorimetry

, Volume 122, Issue 1, pp 207–214 | Cite as

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

  • Lidiane P. Correia
  • José V. V. Procópio
  • Cleildo P. Santana
  • Márcia F. Pinto
  • Elisana A. Moura
  • Ana F. O. Santos
  • Rui O. Macêdo
Article

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.

Keywords

Herbal medicine TG Ozawa model Particle size 

Notes

Acknowledgements

To CNPq, for financial support.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Lidiane P. Correia
    • 1
    • 3
  • José V. V. Procópio
    • 1
  • Cleildo P. Santana
    • 3
  • Márcia F. Pinto
    • 2
  • Elisana A. Moura
    • 2
  • Ana F. O. Santos
    • 2
  • Rui O. Macêdo
    • 1
    • 2
  1. 1.Department of Pharmaceutical SciencesFederal University of PernambucoRecifeBrazil
  2. 2.Department of Pharmaceutical Sciences, Medicine Development and Assays Unified LaboratoriesFederal University of ParaíbaJoão PessoaBrazil
  3. 3.Pharmacy DepartmentState University of ParaíbaCampina GrandeBrazil

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