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A simple and sensitive method for the determination of 39 antibiotics, including sulfonamides and quinolones, in pork, chicken, fish tissues and eggs, has been developed. The sample preparation included ultrasound-assisted extraction (UAE) with 0.1% formic acid in 90:10 acetonitrile/water (v:v) and a final clean-up with Oasis PRiME HLB, a new reversed phase SPE without traditional pre-equilibration...
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