Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 12, Pages 2635-2640Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b00155
Keywords
calf; milk replacers; antibiotics; HPLC-MS/MS
Funding
- Ph.D. fellowship in Veterinary and Animal Science in the Laboratory of Inspection of Food of Animal Origin at the University of Milan
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Calf milk replacers are low-cost feeds that contain available, digestible protein. During their reconstitution, however, the addition of drugs, such as antibiotics, could make them a very simple route for illicit treatment for therapeutic, preventive, or growth-promoting purposes, We developed an HPLC-MS/MS method, preceded by a unique extraction step, able to identify 17 antibiotics from seven classes (penicillin, tetracyclines, fluoroquinolones, sulfonamides, cephalosporins, amphenicols, and lincosamides) in this matrix. Prior to solid phase extraction (SPE), the sample underwent deproteinization and defatting. The method was fully validated according to Commission Decision 2002/657/EC. Decision limits (CC alpha) and detection capability (CC beta) were in the ranges of 0.13-1.26 and 0.15-1.47 ng/mL, respectively. Thirty-eight samples were finally analyzed, showing the occasional presence of marbofloxacin (six samples) and amoxicillin (one sample).
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