Abstract
A simple, rapid sample extraction method for the determination of FQs was developed. Fishery samples were extracted with 2% of 5-sulfosalicylic acid dihydrate and the extracts were analyzed directly without any further purification or clean-up procedures. The FQs were determined with standards of 2% of 5-sulfosalicylic acid dihydrate in the concentration range of 0.1-25.6 μg L−1, and the limit of detection (LOD) was 0.1 μg L−1. The matrix interference originated from fishery samples was eliminated by 2% of 5-sulfosalicylic acid dihydrate and did not interact with horseradish peroxidase (HRP) labeled IgG in western blotting. No significant matrix interference was observed as samples extracted with 2% of 5-sulfosalicylic acid dihydrate. Recoveries of FQs in fishery muscle were between 72.37–94.35% in the concentrations range of 10–50 μg kg−1.This extraction procedure was much rapider and simpler to conventional ELISA extraction procedure and could be used as a time-saving and cost-effective method for FQs monitoring in fishery samples.
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