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Thermal and spectroscopic analysis of florfenicol irradiated in the solid-state

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Abstract

The study has been undertaken to check the effect of ionising radiation on the physical and chemical properties of florfenicol, an antibiotic of a wide range of antibacterial activity. The solid-state samples were subjected to an electron beam generated by accelerator corresponding to the doses of 25, 100 and 400 kGy, and the effect of the exposure was analysed by the methods not requiring changes in the state (with no preliminary treatment), such as SEM, DSC, FTIR, XRD, EPR and HPLC.

Florfenicol irradiated with a dose of 25 kGy has not changed the form or colour, however, a small increase in intensity of some absorption bands in the FTIR spectrum and of some peaks in the XRD pattern, a decrease in the melting point by 0.6°C, the appearance of free radicals and a loss in the FF content within the error of the method (0.91%) have been observed. After irradiation with greater doses (100 and 400 kGy) the changes have intensified, yellow discolouration appeared and the loss of FF content has increased to 6.39%. As follows from the results, the compound studied in solid-state undergoes radiolysis after e-beam irradiation in the doses ≥25 kGy, but lower doses (15–20 kGy) can be applied for its decontamination or sterilization with no adverse effect on its physico-chemical properties.

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Authors and Affiliations

  1. Department of Pharmaceutical Chemistry, Karol Marcinkowski University of Medical Sciences, 6 Grunwaldzka, 60-780, Poznań, Poland

    Barbara Marciniec & M. Stawny

  2. Faculty of Chemistry, Adam Mickiewicz University, 6 Grunwaldzka, 60-780, Poznań, Poland

    Magdalena Hofman

  3. Faculty of Physics, Adam Mickiewicz University, 85 Umultowska, 61-614, Poznań, Poland

    M. Naskrent

Authors
  1. Barbara Marciniec
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  2. M. Stawny
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  3. Magdalena Hofman
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  4. M. Naskrent
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Correspondence to Barbara Marciniec.

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Marciniec, B., Stawny, M., Hofman, M. et al. Thermal and spectroscopic analysis of florfenicol irradiated in the solid-state. J Therm Anal Calorim 93, 733–737 (2008). https://doi.org/10.1007/s10973-008-9137-5

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  • DOI: https://doi.org/10.1007/s10973-008-9137-5

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