Abstract
A qualitative high pressure liquid chromatographic method was established for simultaneous determination of residues of olaquindox and ormetoprim in swine and chicken tissuse. The recoveries of olaquindox added to swine muscle, liver and kidney at levels of 0.05-0.2μg/g were in the ranges of 74.2-83.2%, 71.3~84.1%, 71.6-88.0%, respectively. The detection limit was 0.01μg/g. There coveries of ormetoprim added to chicken muscle at levels of 0.4-4.0μg/g were in the range of 91.0~103.8%. The recoveries of ormetoprim added to chicken liver at levels of 0.2~2.0μg/g were in the range of 90.2~105.6%. The recoveries of ormetoprim added to chicken egg at levels of 0.2~4.0μg/g were in the range of 85.9~102.2%. The detection limit was 0.01μg/g. Three hundred samples including swine muscle, liver, kidney and chicken muscle, liver and eggs were collected from markets in Taipei. No residues of olaquindox were found in 150 samples of swine muscle, liver and kidney. Seven sample of chicken liver were found to have ormetoprim residues at the range of 0.06~022μg/g. Five samples of egg were found to have ormetoprim residues in the range of 0.01~0.06μg/g.
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