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  • Title: The second international reference preparation of viomycin.
    Author: Lightbown JW, Bond JM, Skegg JL.
    Journal: Bull World Health Organ; 1973; 48(2):219-27. PubMed ID: 4352612.
    Abstract:
    The first International Reference Preparation of Viomycin was replaced by the second international reference preparation, consisting of material from the batch that provided the second Working Standard of the US Food and Drug Administration. The International Unit of viomycin was redefined as the activity contained in 0.0012285 mg of the second international reference preparation. Examination of batches of viomycin sulfate from the various sources of production showed that the second international reference preparation was suitable for their assay, whereas a sample previously proposed as the international standard of viomycin was unsatisfactory.
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