Authors
Hee‐Jung Cho, AM Abd El‐Aty, Ayman Goudah, Gi‐Min Sung, Hee Yi, Dong‐Cheol Seo, Jin‐Suk Kim, Jae‐Han Shim, Ji‐Yoon Jeong, Soon‐Ho Lee, Ho‐Chul Shin
Publication date
2008/1
Journal
Biomedical Chromatography
Volume
22
Issue
1
Pages
92-99
Publisher
John Wiley & Sons, Ltd.
Description
The primary objective of this study was to develop a simple, rapid, and efficient method for the simultaneous determination of four fluoroquinolone residues, ciprofloxacin (CFX), danofloxacin (DFX), enrofloxacin (EFX) and norfloxacin (NFX), in chicken eggs. The samples were first monitored by microbiological assay using Escherichia coli as the reference organism, and were then quantified using HPLC with a fluorescence detector. Egg samples were extracted by the liquid‐phase extraction process, and the analytes were analyzed via an ODS column using a mixture of acetonitrile and 0.4% phosphoric acid–0.4% triethylamine (15: 85, v/v) as a mobile phase (pH = 2) without purification. The calibration curves were linear (r2 ≥ 0.999) over a concentration range of 0.1–1.0 µg/mL. The majority of the mean recoveries at four different fortification levels, 0.1, 0.2, 0.5 and 1.0 ppm, ranged from 73.7 ± 7.2% to 87.1 ± 12.7 …
Total citations
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