Abstract
Abstract A rapid and sensitive method for the assay of neostigmine bromide (NBr) in tablets and ophthalmic solutions has been developed. NBr is isolated from its pharmaceutical excipients by the ion-pairing partition column chromatographic principles of Levine and Doyle followed by ultraviolet determination of its alkaline hydrolysis product. Standard recoveries of NBr from simulated tablet mixtures and ophthalmic solutions averaged 99.8%. The standard deviation of repeated analyses of commercial products was less than±1%. The results of the proposed method for commercial products are in good agreement with the USP XVIII procedure. The procedure is applicable to individual tablet assay.
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