Determination and Survey of Fluoroquinolones Residue in Chicken Muscle by HPLC with Fluorescence Detector

액체크로마토그래피-형광검출기를 이용한 닭고기 중 플루오로퀴놀론계 항균물질 정량분석 및 잔류조사

  • 박은정 (인천광역시보건환경연구원) ;
  • 임지흔 (인천광역시 보건환경연구) ;
  • 이성모 (인천광역시 보건환경연구원)
  • Published : 2004.03.01

Abstract

Ofloxacin, norfloxacin, ciprofloxacin, and enrofloxacin in chicken muscle were seperated by liquid extraction and determined with high performance liquid chromatography (HPLC) with fluorescence detector. Analysis was carried out using following conditions; Cl8 column (250${\times}$4.6 mm i.d. 5 ${\mu}{\textrm}{m}$ particle size), mobile phase composed of D.W. (containing 0.4% triethylamine and phospholic acid): methanol : acetonitrile (800:100:100, v/v/v), isocratic pump at a flow rate of 1.0 $m\ell$/min and 50 ${mu}ell$ of injection volume, fluorescence detector with EX278 nm/EM.456 nm. The calibration curves of four fluoroquinolones showed linearity (${\gamma}$$^2$$\geq$0.999) at concenration range of 0.025-0.6 $\mu\textrm{g}$/ml. The recoveries in fortified chicken muscle represented more than 80% with low coefficient of variation (〈10%) for concentration range of four fluoroquinolones. The detection limits for ofloxacin, norfloxacin, ciprofloxacin, and enrofloxacin were 23.5, 3.4, 3.0 and 2.5 ng/g in chicken muscle, respectively. We also monitored fluoroquinolones residue in muscle of chickens (broiler 1:227, Korean native chicken 219, laying chicken 77) using EEC-4-plate screening and HPLC conformation methods. Ten(broiler 5, Korean native chicken 5) out of the fifteen samples which were positively detected by EEC-plate screening method from 1,523 chicken meat were confirmed with ciprofloxacin and enrofloxacin by HPLC. The ranges of residual concentration were 0-0.12 ppm for ciprofloxacin and 0.01-6.79 ppm for enrofloxacin. In conclusion, our method could be applied effectively to determine four fluoroquinolones residues in chicken meat, and further survey for fluoroquinolones residue in chicken meat are needed for more effective control of fluoroquinolones used in livestock.

1. 닭고기에서 4종의 플루오로퀴놀론계 합성항균제(ofloxacin, norfloxacin, ciprofloxacin, enrofloxacin)를 액상추출법으로 추출하여 형광검출기와 HPLC를 이용하여 동시 정량 분석하는 방법을 확립하였으며 분석조건으로서 컬럼은 Symmetry Cl8(250${\times}$4.6 mm id, 5 $\mu\textrm{m}$), 이동상은 0.4% triethylamine 및 0.4% phospholic acid 수용액, methanol 및 acetonitrile 혼합용액(800: 100: 100, v/v/v)을 사용하였으며, 형광검출기는 여기파장 278 nm, 측정파장 456 nm으로 그리고 유속은 1.0 $m\ell$/min., 주입량은 50 ${\mu}\ell$로 하였다. 확립된 분석조건으로 측정한 ofloxacin, norfloxacin, ciprofloxacin, enrofloxacin 표준품의 표준곡선식에서 모두 상관계수 0.999이상의 양호한 직선성을 보였으며, 첨가한 닭고기의 크로마토그람에서도 각각의 물질별 분리시간대에 방해 피크 없이 양호한 분리도를 나타내었다. 0.05∼0.2 $\mu\textrm{g}$/g 첨가한 시료에서 평균 회수율은 ofloxacin 92.0∼95.4%, norflokacin 84.2∼87.3%, ciprofloxacin 78.3∼82.2%, enrofloxacin 91.3∼95.3%이었으며 변이계수(CV)는 2.7∼9.4%이었다. 4종의 동시분석법의 검출한계 및 정량한계는 각각 ofloxacin 23.5 ppb, 35.3 ppb, norfloxacin 3.4 ppb, 5.1 ppb, ciprofloxacin 3.0 ppb, 4.5 ppb, enrofloxacin 2.5 ppb, 3.8 ppb수준이었다. 2. 인천 지역에서 도축한 닭고기 총 1,523수를 EEC-4-plate법으로 검사한 결과 양성반응을 보인 닭고기는 15수(육계 10, 토종닭 5)였으며, HPLC를 이용한 정밀검사결과 육계 5수에서 ciprofloxacin이 불검출 ∼0.04 ppm, enrofloxacin이 0.01∼0.69 ppm수준으로 검출되었으며, 토종닭 5수에서는 ciprofloxacin이 0.02∼0.12 ppm, enrofloxacin이 0.36∼6.79 ppm수준으로 검출되었다.

Keywords

References

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