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High-Performance Liquid Chromatographic Determination of Proquazone and Its m-Hydroxy Metabolite in Spiked Human Plasma and Urine

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A simple and rapid high-performance liquid chromatographic method for the determination of proquazone (PQZ) and its major metabolite, m-hydroxyproquazone, in spiked human plasma and urine was developed. Plasma samples were purified using acetonitrile as a protein precipitant, while urine samples were diluted only with the mobile phase and filtered prior to injection. Samples containing the parent compounds and glafenine (internal standard) were eluted from a reversed-phase C8 column using acetonitrile-0.025 M sodium acetate (60 + 40) adjusted to pH 5 as the mobile phase and detected at 234 nm. Peak area ratios of the analytes versus internal standard were used for calibration. The mean recoveries from plasma and urine samples spiked with PQZ and its m-hydroxy metabolite ranged from 97.87 to 103.88%. The relative standard deviation for the within- and between-day analyses were <4%. The proposed method was applied for the assay of PQZ in laboratory-made tablets.
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Document Type: Research Article

Affiliations: University of Alexandria, Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Elmessalah 21521, Alexandria, Egypt.

Publication date: July 1, 2007

More about this publication?
  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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