Journal
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Volume 40, Issue -, Pages 24-31Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2014.12.005
Keywords
Food composition; Food analysis; Nitrofurans; Veterinary residues; Chicken meat; LC/MS/MS; Isotope dilution mass spectrometry; Reference method; Method validation; Measurement uncertainty; Food safety
Categories
Funding
- Korea Research Institute of Standards and Science [14011050]
- National Research Foundation of Korea [22A20130012529] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A method based on isotope dilution-liquid chromatography/tandem mass spectrometry (ID-LC/MS/MS) has been developed as a reference method for the accurate determination of low-level metabolite residues of 4 nitrofuran antibiotics (furazolidone, furaltadone, nitrofurantoin, and nitrofurazone) in meat. A generally adopted method based on the acid-catalyzed release of protein-bound metabolites, their conversion into 2-nitrobenzaldehyde imine-type derivatives, liquid-liquid extraction, and cleanup by solid-phase extraction cartridges was followed but with modification and further optimization for accurate and non-biased measurement results to be used as a definitive reference method. One isotope-labelled analogue for each of the 4 metabolites was used as an internal standard. Validation and performance characterization of the method were conducted by analyzing gravimetrically fortified chicken meat in the range of 0.5-3 mu g/kg. The method provided accurate analytical results with the relative expanded uncertainty of 3%. Thus, the method can be used for providing reliable higher-order reference values for the quality control of analytical methods used in general testing laboratories near and below the minimum required performance limit (MRPL) set at 1 mu g/kg by the EU. (C) 2015 Elsevier Inc. All rights reserved.
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