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  • Title: Collaborative study of a spectrophotometric determination of ferric, ferrous, and total iron in drugs by reaction with alpha,alpha'-dipyridyl.
    Author: Sullivan DJ.
    Journal: J Assoc Off Anal Chem; 1977 Nov; 60(6):1350-4. PubMed ID: 924940.
    Abstract:
    A spectrophotometric method for determining Fe2+, Fe3+, and total Fe in drugs has been developed, using alpha,alpha'-dipyridyl as the colorimetric reagent. The method is applicable to tablets elixirs, injectables, and bulk powder. Eight collaborates analyzed a synthetic iron preparation and 7 commercial samples. For the synthetic iron preparation, the average recovery was 100.3% and the coefficient of variation was 1.02%. For 7 commercial samples, the average coefficient of variation was 1.44%. The method has been adopted as official first action.
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