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Determination of Apramycin in Animal Feeds by Solid-Phase Extraction and Liquid Chromatography with Precolumn Derivatization and Fluorescence Detection

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A high-performance liquid chromatographic method for determining apramycin in animal feeds was developed. Apramycin in feeds was extracted with 0.1 M HCl solution and cleaned up with an MCX solid-phase extraction column. The purified extract was derivatized with o-phthaldehyde, and components were separated on a C18 column and detected with a fluorescence detector. Mass spectrometric data confirmed that apramycin was derivatized at all the 4 primary amines on the apramycin molecule. Average recoveries at 8 included levels (5, 10, 20, 40, 80, 200, 400, and 2000 mg/kg) ranged from 92.2 to 100.5%, and the coefficients of variation were <6.5%. Standard curves were linear over the range 0.05 to 10 g/mL. The detection and quantitation limits were determined to be 0.2 and 1.0 mg/kg, respectively.
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Document Type: Research Article

Affiliations: China Agricultural University, State Key Laboratory on Animal Nutrition, Beijing 100094, People's Republic of China.

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 The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better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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