0000000001308936
AUTHOR
Vadims Bartkevičs
Veterināro preparātu atlieku noteikšana ar masspektrometrijas metodēm
Analysis of veterinary drugs residues using masspectrometric methods. Bartkevičs V.. supervisors Dr.chem,J.Ģībietis. Dissertation. 65 pages, bibliography 55 citations. In Latvian. VETERINARY DRUGS. GAS CHROMATOGRAPHY. HIGH PERFORMANCE LIQUID CHROMATOGRAPHY, MASS SPECTROMETRY. LEVAMIZOLE, STEROID SUBSTANCES, ANTIBIOTICS, NSAID GROUP COMPOUNDS. This dissertation is dealing with determination of veterinary drug residues using masspectrometric methods. Survey of publications dealing with analysis of levamisole, nonsteroid anti-inflammatory drugs, steroid compounds and sulphonamides was performed. Masspectrometric methods for determination of residues of 33 different compounds are elaborated. Ma…
Occurrence of glyphosate in beer from the Latvian market
A sensitive LC-MS/MS method for the determination of glyphosate in beer has been developed, validated, and applied to analyse 100 beer samples from 24 different producers and distributors in Latvia. The selected samples represented most beer brands and varieties sold in local supermarkets. Different procedures for sample preparation and chromatographic separation were compared. The final version of the method consisted of solid phase extraction, chromatographic separation on aminopropyl stationary phase, and detection using tandem mass spectrometry. The concentration of glyphosate in beer varied from below the LOD of 0.2 μg kg−1 up to 150 μg kg−1, higher than previously reported. Significan…