Affiliation:
1. National Center for Drug Analysis, Food and Drug Administration, St. Louis, Mo. 63101
Abstract
Abstract
A semiautomated chromotropic acid colorimetric procedure was collaboratively studied by 6 laboratories, both as a composite assay and as an individual tablet assay method. Results agreed well with the USP and NF methods. The coefficients of variation ranged from 0.54 to 2.48%. The method has been adopted as official first action for the analysis of coated and uncoated tablets of methenamine mandelate, methenamine, and methenamine with sodium biphosphate.
Publisher
Oxford University Press (OUP)
Cited by
1 articles.
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