Screening for β-agonists in sheep urine and eyes by an enzyme-linked immunosorbent assay in the state of Kuwait

Data are reported here on the assessment of the potential use of an enzyme-linked immunosorbent assay (ELISA) to monitor the presence of the β-agonist, clenbuterol in 142 samples of sheep urine and 53 samples of eye tissues from the same sheep. Data obtained showed that the clenbuterol levels ranged in the urine and eye tissues from not detected to 0.272 ppb and not detected to 1.54 ppb tissue, respectively. For confirmation, all samples that showed to be ELISA positive for clenbuterol residues were analyzed by GC–MS and were all found to be negative.