24 research outputs found

    Densitometric determination of zinc bacitracin and nystatin in animal feed

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    BACKGROUND: The European Union has forbidden the use of antibiotics as additives in animal feed. Zn-bacitracin (Zn-BC) and nystatin (NYS) were frequently used for their growth-promoting effects and for feed conversion in poultry, pigs and cattle. An HPTLC method has been developed for separating Zn-BC and NYS in the mixture, for routine quality control. RESULTS: The separation was obtained using RP-18

    Investment treaties and national sovereignty: latest developments

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