Determination of Acethylsalicylic acid (Aspirin) and Salicylic acid in Eel (Anguilla japonica) Plasma by High-performance Liquid Chromatography

HPLC에 의한 뱀장어 (Anguilla japonica) 혈장중의 acethylsalicylic acid (aspirin)과 salicylic acid의 측정

  • Kim, Dong-Wan (Department of Aquatic life Medicine, Kunsan National University) ;
  • Koo, Jae-Geun (Department of Food Science & Biotechnology, Kunsan National University) ;
  • Park, Sung-Woo (Department of Aquatic life Medicine, Kunsan National University)
  • 김동완 (군산대학교 수산생명의학과) ;
  • 구재근 (군산대학교 식품생명공학과) ;
  • 박성우 (군산대학교 수산생명의학과)
  • Published : 2007.08.30

Abstract

To decrease stress in eel (Anguilla japonica) during its culture or transportation, aspirin (ASA) known as analgesic, antiinflammatory and antithrombic agent was administrated by dipping or oral routes. Concentrations of aspirin (ASA) and salicylic acid (SA) in eel plasma were simultaneously measured by a high performance liquid chromatography (HPLC). The plasma was acidified with 0.2 M HCl and 0.2 M orthophosphoric acid, and mixed with acetonitrile. ASA and SA extracted with acetonitrile were analyzed by the HPLC equipped with reversed phase Novapak C18 column (4 ㎛ silica, 150×4 mm) and UV detector(237 nm). The mobile phase consisted of 740 ㎖ water, 900 ㎕ orthophosphoric acid (85%) and 180 ㎖ acetonitrile. The retention times of ASA, SA and 2-methylbenzoic acid(MBA) were 4.8 min, 8.4 min and 11.5 min, respectively. The limit of quantification was 0.01 ㎍/㎖ for SA and 0.05 ㎍/㎖ for ASA. The mean recovery from eel plasma was 70.8~99.6% for ASA and 95.2~100.3% for SA. This HPLC method was applied to analyze ASA and SA of eel plasma after either dipping in a concentration of 20 ppm or feeding the feed supplemented with 50 ㎎/kg BW. Only SA was detected in eel plasma after the administration of ASA by dipping or oral routes because the drug was quickly decomposed into SA in eel plasma. The amount of SA in eel plasma reached the highest value at 3hr in dipping and 7 days in oral administration. When the ASA-administrated eel were kept in ASA free aquaria, 0.02-0.03 ㎍/㎖ of SA were detected 48 hr after the administration in both routes.

인체에 널리 사용되고 있는 Aspirin (ASA)을 양식 뱀장어 (Anguilla japonica) 약욕 또는 경구 투여한 다음 혈장 중의 ASA와 salicylic acid (SA)의 양을 HPLC로 측정하였다. 뱀장어 혈장은 0.2 M HCl과 0.2 M orthophosphoric acid로 산성화시킨 다음 acetonitrile과 혼합하여 ASA와 SA를 추출하였다. 2약제의 정량은 Novapak C18과 UV detector (237 nm)가 장착된 HPLC로 측정하였다. 이 때 이동상은 740 ㎖의 증류수, 900 ㎕의 orthophosphoric acid와 180㎖의 acetonitrile을 사용하였다. ASA, SA 및 내부 표준물질로 사용한 2-methylbenzoic acid (MBA)의 retention time은 각각 4.8분, 8.4분 및 11.4분이였으며, 측정한계 농도는 ASA가 0.05 ㎍/㎖, SA는 0.01 ㎍/㎖였다. 혈장으로 부터의 평균회수율은 ASA가 70.8-99.6%, SA는 95.2-100.3%였다. 뱀장어에 ASA를 약욕 (20 ppm) 또는 경구투여 (50 ㎎/kg BW) 한 다음 채취한 혈장을 시료로 이 방법으로 ASA와 SA의 양을 측정한 결과 단지 SA만 검출되어졌고, ASA는 검출되지 않았다. 이는 ASA가 혈장내에서 신속히 SA로 분해되기 때문으로 판명되었다. 또 ASA에 약욕시킨 경우에는 약욕 후 3시간후에 혈장내의 SA양이 최고치에 도달하였으며, 경구투여 한 경우에는 7일후에 최고치에 도달하였다. 한편 ASA를 투여한 다음 ASA 무첨가 수조에 수용한 결과 2투여 경로 모두 48시간 이후에는 SA가 0.02-0.03 ㎍/㎖이 검출되어 잔류의 문제도 거의 없었다. HPLC를 이용한 혈장내의 ASA와 SA의 검출법은 신속하며 정확한 방법으로 뱀장어 이외의 어류에도 활용 가능할 것으로 생각된다.

Keywords

References

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