Thermoanalytical method for studying the guest content in cyclodextrin inclusion complexes |
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| Authors: | Judit Orgoványi L Pöppl Klára H-Otta G A Lovas |
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| Institution: | 1.E?tv?s Loránd University of Budapest, Department of Chemical Technology and Environmental Chemistry;2.E?tv?s Loránd University of Budapest, Department of Chemical Technology and Environmental Chemistry;3.E?tv?s Loránd University of Budapest, Department of Mineralogy |
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| Abstract: | 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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