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Determination of Lipid Oxidation Level in Broiler Meat by Liquid Chromatography

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An assay was conducted for the determination of malondialdehyde (MDA) levels in broiler meat. The method involves extraction of tissues with trichloroacetic acid (TCA) and reaction of the TCA extract with 2,4-dinitrophenylhydrazine (DNPH). After separation of the MDA-DNPH complex using a solid-phase extraction C18 column, samples were eluted with 1 mL acetonitrile. Aliquots of 20 μL acetonitrile were analyzed by liquid chromatography on reversed-phase C18 column (3 μm) with UV detection. The products were eluted isocratically with the mobile phase containing acetonitrile–water–acetic acid (39 + 61 + 0.2, v/v/v). The retention time was for MDA-DNPH was 6.5 min, and the detection limit was 3.5 μg/kg. Two extraction methods (cold and hot) were also used in the study. The results showed that hot extraction increased results about 55.8% and recovery from samples spiked with 116.6 μg/kg was lower (74.6%) in comparison with cold extraction (94.7%).
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Document Type: Research Article

Affiliations: University of Veterinary Medicine, Department of Food Hygiene and Technology, Komenského 73, 041 81 Košice, The Slovak Republic.

Publication date: 2004-09-01

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 The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory;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