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With Council Regulation 2821/98 zinc bacitracin, spiramycin, tylosin and virginiamycin, and with Commission Regulation 2788/98 olaquindox, were banned from animal feed as feed additives. To control the compliance of the ban a single multi-analyte liquid chromatography-mass spectrometry (LC-MS) method for their detection and quantification in animal feed was developed. A 2.5g aliquot of feedstuff was...
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