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Thermoanalytical method for studying the guest content in cyclodextrin inclusion complexes

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Summary

The interaction of cypermethrin with β-cyclodextrin was investigated using different (coprecipitation, suspension, kneading and ‘melting in solution’) complexation methods and qualifying the resulted complexes by UV-spectrophotometry, thermal methods (TG, DTG and DSC) and X-ray powder diffraction. The total guest content of complexes can be measured by UV-spectrophotometry in aqueous ethanol solution, while the uncomplexed guest fraction of samples can be determined by DSC based on a previous calibration curve, which was found between the melting enthalpy change of cypermethrin and the guest content of physical mixture samples. The combination of both analytical methods enables the determination of really complexed guest content.

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Authors and Affiliations

  1. Eötvös Loránd University of Budapest, Department of Chemical Technology and Environmental Chemistry, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary

    Judit Orgoványi

  2. Eötvös Loránd University of Budapest, Department of Chemical Technology and Environmental Chemistry, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary

    Klára H.-Otta

  3. Eötvös Loránd University of Budapest, Department of Mineralogy, Pázmány Péter sétány 1/C, 1117 Budapest, Hungary

    G. A. Lovas

Authors
  1. Judit Orgoványi
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  2. L. Pöppl
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  3. Klára H.-Otta
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  4. G. A. Lovas
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Orgoványi, J., Pöppl, L., H.-Otta, K. et al. Thermoanalytical method for studying the guest content in cyclodextrin inclusion complexes. J Therm Anal Calorim 81, 261–266 (2005). https://doi.org/10.1007/s10973-005-0776-5

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  • DOI: https://doi.org/10.1007/s10973-005-0776-5

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