Determination of oxytetracycline levels in rainbow trout serum on a biphenyl column using high-performance liquid chromatography |
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| Authors: | Miller Ron A Reimschuessel Renate Carson Mary C |
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| Affiliation: | U.S. Food and Drug Administration, Center for Veterinary Medicine, Office of Research, 8401 Muirkirk Road, Laurel, MD 20708, USA. Ron.Miller@fda.hhs.gov |
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| Abstract: | We developed a simple and sensitive high-performance liquid chromatography method on a biphenyl column to determine oxytetracycline (OTC) levels in rainbow trout serum. The assay used deproteination, filtration, and subsequent separation on a reverse-phase biphenyl column, with UV detection at 355 nm. OTC (7.8-7.9 min) was completely resolved from structurally similar riboflavin (10.4-10.5 min), a common feed supplement. Estimated limits of detection and quantitation of OTC were 0.01 and 0.04 microg/mL, respectively. The average recovery for OTC was 102% with a R.S.D. of 8.34%. Calibration standards were linear from 0.01 to 10 microg/mL. |
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