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1

Simultaneous determination of fluoroquinolones in feed by liquid chromatography with fluorescence detection

100%
Gbylik M., Posyniak A., Gajda A.
Bulletin of the Veterinary Institute in Puławy
|
2012
|
tom 56
|
nr 3
An H PLC method with fluorescence detection (HPLC-FLD) was developed for the simultaneous quantitative determination of enrofloxacin, ciprofloksacin, sarafloxacin, and difloxacin in feed. The samples were extracted with 0.25% formic acid in ultrasonic bath and purified by solid phase extraction (SPE) on Strata-X cartridges. The samples were analysed on Luna C8 liquid chromatography column with gradient programme by acetonitrile and 0.025 M phosphoric acid with 0.0025 M sodium 1- heptanesulfonate monohydrate. The method was successfully validated according to the requirements of the European Decision 2002/657/EC. Recoveries of the components from spiked feed samples ranged from 55%- 70%. Repeatability was <7%. The method presented here proved to be efficient, rapid, and a selective approach for determination of fluoroquinolones in feed.
2

Wykrywanie olaquindoksu i karbadoksu w paszach techniką chromatografii cieczowej z detektorem UV

100%
Gbylik M., Gajda A., Sniegocki T., Posyniak A.
Pasze Przemysłowe
|
2011
|
tom 20
|
nr 2
3

Multi-class procedure for analysis of antibacterial compounds in eggs by liquid chromatography-tandem mass spectrometry

88%
Bladek T., Posyniak A., Gajda A., Gbylik M., Zmudzki J.
Bulletin of the Veterinary Institute in Puławy
|
2012
|
tom 56
|
nr 3
A liquid chromatographic method coupled with tandem mass spectrometry for determination of residues of ß-lactams, macrolides, tetracyclines, quinolones, sulfonamides, and lincosamides in eggs has been described. Analytes were isolated from egg samples by solvent extraction method and extracts were cleaned by filtration on OASIS HLB cartridges. The whole procedure was validated according to European Commission Decision 2002/657/EC. The recovery ranged between 86% and 110%. The repeatability was below 16% and within-laboratory reproducibility was lower than 20%. The method was successfully applied in the official control of antibacterial compounds residue in Poland.
4

Analytical pocedure for the determination of lincomycin in honey by liquid chromatography-mass spectrometry

88%
Bladek T., Gajda A., Gbylik M., Posyniak A., Zmudzki J.
Bulletin of the Veterinary Institute in Puławy
|
2010
|
tom 54
|
nr 2
205-209
A reliable and sensitive liquid chromatography-electrospray ionisation tandem mass spectrometry analytical method has been developed for the determination of lincomycin in honey samples. After extraction with phosphate buffer by ultrasound, the extracted solution was subjected to the polymeric solid-phase extraction cartridge to remove endogenous compounds. The analysis was carried out on a triple-quadropule tandem mass spectrometer in the multiple reaction monitoring (MRM) mode via electrospray interface operated in positive ionisation modes. The procedure was validated in accordance with the European Commission Decision 2002/657/EC. The mean recovery of the analyte was 80%, with the corresponding intra- and inter-day variation less than 10% and 15%, respectively. Decision limits (CCα) and detection capability (CCß) were 5.60 and 6.11 µg kg⁻¹, respectively.
5

Multi-class procedure for analysis of antibacterial compounds in animal tissues by liquid chromatography-tandem mass spectrometry

88%
Bladek T., Posyniak A., Gajda A., Gbylik M., Zmudzki J.
Bulletin of the Veterinary Institute in Puławy
|
2011
|
tom 55
|
nr 4
A liquid chromatographic method coupled with tandem mass spectrometry for the determination of residues of β-lactams, macrolides, tetracyclines, quinolones, sulfonamides, aminoglycosides, and lincosamides in animal tissues was described. Analytes were isolated from biological material with acetonitrile or with trichloroacetic acid. The procedure was validated according to European Decision 2002/657/EC.
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