Semiautomated Assay for the Simultaneous Determination of PROPOXYPHENE HYDROCHLORIDE (cas 1639-60-7) and Paramethasone Acetate in Coated Single Tablets

Add time:08/02/2019    Source:sciencedirect.com

A semiautomated method for the simultaneous determination of PROPOXYPHENE HYDROCHLORIDE (cas 1639-60-7) and paramethasone acetate is described for coated tablets. A novel device for the removal and dissolution of tablet coatings is outlined. Solutions are sampled with an automatic sampler at the rate of 20/hr. and fed to two independent systems for analysis. A modified blue tetrazolium procedure is utilized for the determination of paramethasone acetate producing essentially complete color development within 5 min. at room temperature. Working concentrations of 12.5 mcg. paramethasone acetate per ml. can be assayed without resorting to range expansion. Analysis of propoxyphene hydrochloride is accomplished by the formation of a complex with bromocresol purple with subsequent extraction and color measurement in ethylene dichloride.

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