Comparison of the determination of four sulphonamides and their N4-acetyl metabolites in swine muscle tissue using liquid chromatography with ultraviolet and mass spectral detection

Journal of Chromatography. B, Biomedical Applications
G BalizsS A Hewitt

Abstract

A discharge-assisted LC-MS method has been developed and validated for the analysis of four sulphonamides (sulphathiazole, sulphadiazine, sulphamerazine and sulphadimidine) and their N4-acetyl metabolites in the muscle of swine treated with Polysulpha-Complex, which contains all four drugs. The clean-up procedure developed involved chloroform-acetone extraction followed by Sep-Pak silica solid-phase extraction. In parallel a LC-UV method was validated using the same clean-up procedure. Blank tissue was fortified at levels between 20 and 100 micrograms/kg. [13C]sulphadimidine was used as internal standard. The samples were analysed with thermospray LC-MS. The [M + H]+ ion was the major ion in all cases and was employed for single-ion monitoring. The limits of detection (LOD) were below 25 micrograms/kg and the limits of quantification (LOQ) for most sulphonamides were ca. 100 micrograms/kg. Incurred muscle tissues were measured by both LC methods and the concentrations of the sulphonamides were found to be similar. However, the LC-MS procedure is more suitable for confirmatory analysis due to its specificity.

Citations

May 11, 2005·Journal of Separation Science·Juan José Berzas NevadoFrancisco Javier Guzmán Bernardo
Sep 15, 2005·Journal of Separation Science·Adela KrivohlavekFranjo Plavic-Plavsic

Related Concepts

Acetylation
Metazoa
Liquid Chromatography
Drug Residues
Chromatography, Gas-Liquid-Mass Spectrometry
Meat
Muscle
Mass Spectrometry
Sulfazin
Trimetox

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