Wicker A L, Turberg M P, Coleman M R
Lilly Research Laboratories, A Division of Eli Lilly and Company, Greenfield, IN 46140-0708, USA.
Analyst. 1995 Dec;120(12):2879-81. doi: 10.1039/an9952002879.
Several enzyme immunoassay test kits are commercially available for screening of matrices including cattle feed, tissues, faeces and urine for the presence of beta-agonists. The kits utilized for this evaluation offer sensitivity as low as 0.1 ng ml-1 (assay solution concentration, not test sample). Evaluation of ractopamine hydrochloride (LY31537) solutions at concentrations as high as 1000 ng ml-1, using six different kits from four different manufacturers, showed cross-reactivity of less than 0.5%.
