Abstract
At 24 h after reindeer received a single intramuscular injection of famphur at 15 mg/kg body weight, residues were found preponderantly in fatty tissue (8.05–9.14 ppm), except for the injection-site muscle. There residues ranged from 0.233–635.2 ppm. This variance demonstrates the difficulty of analyzing the true injection site. Nevertheless, famphur (for some period less than 1 wk) apparently has a depot effect in injection-site muscle after an injection. At 1 wk post-treatment, residues of 0.031–0.192 ppm of famphur were found in fat; 1 in jection-site muscle and 1 liver tissue contained residues of 0.026 and 0.031 ppm, respectively. Famphur residues in fat declined steadily through 5 wk, and none were detectable at 7 wk post-treatment. No famphur was detected in tissues other than fat at 5 wk post-treatment. No oxygen analogue (dimethyl p -dimethylsulfamoyl phenyl phosphate) was found above the lower limit of sensitivity (0.06 ppm) of the method.
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