1.
J Chromatogr
; 489(1): 127-37, 1989 Apr 07.
Artigo
em Inglês
| MEDLINE
| ID: mdl-2745644
RESUMO
Methods are described for the screening and confirmation of residues of the thyreostatics thiouracil, methylthiouracil and propylthiouracil in urine samples of cattle at levels down to 25 micrograms/l. After a selective preconcentration of the thiol-containing thyreostatics on a mercurated affinity column, the analytes are derivatized by extractive alkylation and analysed by gas chromatography with nitrogen-phosphorus or mass spectrometric detection.