title: Gas-liquid chromatographic determination of ethopabate in feed premixes.
abstract: A gas-liquid chromatographic method is presented for determining ethopabate in 0.8 and 8.0% premixes. A sample is extracted with tetrahydrofuran containing an internal standard, by sonication or overnight soaking. The extract is clarified by centrifugation, diluted if necessary, and injected into a gas chromatograph equipped with a flame ionization detector. Average per cent recoveries for spiked blank samples were 100.6 at the 0.8% level and 100.4 at the 8.0% level. Precision, as indicated by replicate analyses of several premixes, ranged from 0.5 to 1.7% relative standard deviation.
mesh_terms: D062365:Aminobenzoates / Q000032:analysis*; D000821:Animal Feed / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D005011:Ethopabate / Q000032:analysis*
chemical_list: D062365:Aminobenzoates; D005011:Ethopabate