Residues of the beta‐agonist clenbuterol in tissues of medicated farm animals
作者:
C. T. Elliott,
W. J. McCaughey,
H. D. Shortt,
期刊:
Food Additives & Contaminants
(Taylor Available online 1993)
卷期:
Volume 10,
issue 2
页码: 231-244
ISSN:0265-203X
年代: 1993
DOI:10.1080/02652039309374145
出版商: Taylor & Francis Group
关键词: beta‐agonist;clenbuterol;pharmacokinetics;assay
数据来源: Taylor
摘要:
Reports of the illegal use of clenbuterol as a growth promotant prompted the development of a competitive enzyme immunoassay for this drug. This procedure was utilized to study the elimination of clenbuterol from tissues in sheep medicated with both therapeutic and growth‐promoting doses of the drug. The results indicated that prior to removal of medication clenbuterol was widely distributed throughout the animal tissues. However as the withdrawal periods increased fluid targets such as urine and bile became less effective at detecting clenbuterol usage. At both therapeutic and growth‐enhancing concentrations of clenbuterol liver samples remained positive uptothe maximum withdrawal time given in this experiment (15 days). Concentrations of clenbuterol likely to cause food poisoning ( > 100 ng/g) were only detected in liver samples taken prior to the removal of medication. The highest recorded concentration of clenbuterol in muscle was 22· 5 ng/g.
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