PuSH - Publikationsserver des Helmholtz Zentrums München: Determination of two metabolites of albendazole, albendazole-sulfoxide and albendazole-sulfone in cow's milk using an HPLC method: A systematic approach to optimise extraction conditions.

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Romvari, Z.* ; Fekete, J.* ; Kemeny, S.* ; Pokol, G.* ; Gebefügi, I. ; Kettrup, A.

Determination of two metabolites of albendazole, albendazole-sulfoxide and albendazole-sulfone in cow's milk using an HPLC method: A systematic approach to optimise extraction conditions.

Chromatographia 48, 777-784 (1998)

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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.

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Reversed phase HPLC methods for the determination of two metabolites of albendazole in cow's milk are described. Albendazole is an anthelmintic agent used both in veterinary and human practice. Its main metabolites are albendazole-sulfoxide and albendazole-sulfone. The separation of the two metabolites was performed on a μ-Bondapak C-18 column using an acetonitrile/methanol/phosphate buffer as mobile phase, with detection at 290 nm. For the sample preparation of the milk samples we used solid phase extraction. A new sample treatment optimisation procedure is also presented for the sample preparation method. Since sample preparation is a critical step in the analysis of residues in biological samples, the second part of our publication describes an optimisation using Taguchi's methodology that increased recovery, accuracy and reliability. After optimisation of the sample preparation, the limit of detection was 10 ng mL⁻¹ milk and the recovery was 70–80% in the concentration range of 30–1000 ng mL⁻¹ milk for both metabolities.

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