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Determination of oxolinic acid residues in the muscle tissue of olive flounder (Paralichthysolivaceus) by a lateral flow immunoassay

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This study was designed to determine oxolinic acid (OA) residues in the muscle of olive flounder (Paralichthysolivaceus) by a lateral flow immunoassay (LFIA) and ultra-performance liquid chromatography coupled with fluorescence detection (UPLC–FLD). After 25 cultured olive flounder were treated by dipping in water dosed with OA (50 mg/L water for 1 h), muscle tissues were sampled and prepared for the detection of OA residues. The visual detection limit of the test strip for OA determined by the C/T ratio of 1 was 28 µg/kg of muscle. The detection limit of OA based on the standard curve was 4 and 1.6 µg/kg of muscle using LFIA and UPLC–FLD, respectively, and recoveries of all spiked samples by LFIA and UPLC–FLD were >96%. LFIA and UPLC–FLD showed good correlation (R 2 > .9997) for a series of samples collected over 5 days post treatment. The LFIA is applicable to the detection of OA in the muscle tissue of farmed fish, and is an effective and economical method that will enable high-throughput screening.
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Keywords: lateral flow immunoassay; muscle residues; olive flounder; oxolinic acid; ultra-performance liquid chromatography

Document Type: Research Article

Affiliations: 1: Research Institute of Life Sciences, College of Veterinary Medicine, Gyeongsang National University, Chinju, Republic of Korea 2: Food and Drug Analysis Section, Chungcheongbuk-do Institute of Health and Environment, Cheongwon, Korea 3: Department of Bioengineering, Graduate School of Science and Engineering, Bioengineering Division, Hacettepe University, Ankara, Turkey 4: Department of Medical Humanities and Social Medicine, College of Medicine, Kosin University, Busan, Republic of Korea

Publication date: May 3, 2016

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