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  • Title: Determination of amprolium in feeds: collaborative study.
    Author: Davis EJ.
    Journal: J Assoc Off Anal Chem; 1979 May; 62(3):621-3. PubMed ID: 479090.
    Abstract:
    The official final action method, 42.028--42.032, for determining amprolium in feeds was modified by a change in the preparation of aluminum oxide for chromatography. A premix containing 0.5% amprolium was collaboratively studied by the modified and the official methods. Compared with the modified method, 87.7% of the drug was recovered from the premix by using the official method. The modification makes possible the assay of premixes as well as finished feeds. The official final action method has been modified to incorporate this change.
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