A combined liquid chromatography-triple-quadrupole mass spectrometry method for the residual detection of veterinary drugs in porcine muscle, milk, and eggs.
A liquid chromatography-electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) method was developed for monitoring and detection of four different drugs, namely acetanilide, pentylenetetrazole, phenacetin, and tetramethrin in porcine muscle, pasteurized milk, and table egg samples. For acetanilide and pentylenetetrazole, the samples were extracted with 0.1 % formic acid in acetonitrile, followed by defatting with n-hexane, partitioning at -20 °C for 1 h, centrifugation, and filtration, whereas the quick, easy, cheap, effective, rugged, and safe "QuEChERS" method was used for phenacetin and tetramethrin. The final extracts were combined and analyzed in a single chromatographic run using an XBridge(TM) analytical column and 0.1 % formic acid and 10 mM ammonium formate in ultrapure water (A) and 0.1 % formic acid and 10 mM ammonium formate in methanol (B) as the mobile phase. Owing to the unavailability of internal standards, matrix-matched calibrations were used for analyte quantification with coefficients of determination (R (2)) ≥ 0.9865. The intra- and inter-day accuracies ranged from 60.75 to 90.90 % and from 63.75 to 89.30 %, respectively, while the respective analytical precisions were 1.48-17.44 % (23.3 % for porcine sample spiked with phenacetin) and 1.97-15.78 %. The limits of quantification (LOQ) were between 0.5 and 2.5 ng/g in the matrices tested. Food samples purchased from local markets in Seoul were analyzed using the developed method and none of the tested drugs was detected.
['Zhang|Dan|D|', 'Park|Zee-Yong|ZY|', 'Park|Jin-A|JA|', 'Kim|Seong-Kwan|SK|', 'Jeong|Daun|D|', 'Cho|Sang-Hyun|SH|', 'Shim|Jae-Han|JH|', 'Kim|Jin-Suk|JS|', 'Abd El-Aty|A M|AM|', 'Shin|Ho-Chul|HC|']
D000818:Animals D002853:Chromatography, Liquid D004531:Eggs D004784:Environmental Monitoring D005506:Food Contamination D008460:Meat D008892:Milk D009132:Muscles D013552:Swine D053719:Tandem Mass Spectrometry D019155:Veterinary Drugs
Veterinary drugs Porcine muscle Milk Tandem mass spectrometry Table eggs QuEChERS Animal food products