期刊Final product analysis in the e-beam and gamma radiolysis of aqueous solutions of metoprolol tartrate.pdfVIP
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ARTICLE IN PRESS
Radiation Physics and Chemistry 75 (2006) 1006–1017
/locate/radphyschem
Final product analysis in the e-beam and gamma radiolysis of
aqueous solutions of metoprolol tartrate
Catherine Slegers, Bernard Tilquin
´ ´ ´
Universite Catholique de Louvain, Unite d’Analyse Chimique et Physico-chimique des Medicaments, CHAM 72.30,
Avenue E. Mounier, 72, B-1200 Brussels, Belgium
Received 18 October 2005; accepted 7 December 2005
Abstract
The radiostability of metoprolol tartrate aqueous solutions and the influence of the absorbed dose (0–50 kGy), dose rate
(e-beam (EB) vs. gamma (g)) and radioprotectors (pharmaceutical excipients) are investigated by HPLC-UV analyses and
through computer simulations. The use of radioprotecting excipients is more promising than an increase in the dose rate
to lower the degradation of metoprolol tartrate aqueous solutions for applications such as radiosterilization. The
decontamination of metoprolol tartrate from waste waters by EB processing appears highly feasible.
r 2006 Elsevier Ltd. All rights reserved.
Keywords: Radiosterilization; Radioprotection; Drug aqueous solution; Drug degradation; Metoprolol tartrate
1. Introduction Two potential applications of the radiolysis of drugs
in aqueous solution, at high absorbed doses, are the
The radiolysis of drugs in aqueous solution, with the
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