Confirmatory analysis of non-steroidal anti-inflammatory drugs in bovine milk by high-performance liquid chromatography with fluorescence detection.
HPLC with fluorescence detection is considered for confirmatory analysis of group B veterinary drugs by the European Union legislation. A procedure for confirming the presence of anti-inflammatory non-steroidal drug (NSAID) residues in bovine milk by reversed phase high-performance liquid chromatography with fluorescence detection is herein described. The native fluorescence of nine drugs belonging to different NSAID sub-classes, namely flurbiprofen, carprofen, naproxen, vedaprofen, 5-hydroxy-flunixin, niflumic acid, mefenamic acid, meclofenamic acid and tolfenamic acid, allowed for detection in bovine milk down to 0.25-20.0 microg/kg. Confirmation of the nine NSAIDs is attained by fluorescence detection at characteristic excitation and emission wavelengths. The procedure described is simple and selective. Limits of quantification (LOQs) ranging between 0.25 and 20 microg/kg were measured; satisfactory trueness and within-laboratory reproducibility data were calculated at LOQ spiking levels, apart from 5-hydroxy-flunixin. The procedure developed is used in our laboratory for confirmation of each one of the above mentioned NSAIDs in bovine milk, to support results after HPLC quantitative analysis with UV-vis detection.
Gallo
Pasquale
P
Istituto Zooprofilattico Sperimentale del Mezzogiorno, Dipartimento di Chimica, Via Salute, 2, 80055 Portici, NA, Italy. pasquale.gallo@cert.izsmportici.it
Fabbrocino
Serena
S
Dowling
Geraldine
G
Salini
Marco
M
Fiori
Maurizio
M
Perretta
Giuseppe
G
Serpe
Luigi
L
D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000032:analysis*; D002417:Cattle; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D004350:Drug Residues / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis; D057230:Limit of Detection; D008892:Milk / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
D000894:Anti-Inflammatory Agents, Non-Steroidal