Metronidazole is a nitroimidazole compound active in treatment of anaerobic protozoan and bacterial infection. It is considered to be carcinogenicity and maximum residue limit in any animal edible tissue is zero. This study is aimed at developing a reverse phase high performance liquid chromatographic method (RP-HPLC) to detect metronidazole residues in fish tissues, eggs and milk. The compound is extracted with acetonitrile in fish tissues,and with ethyl acetate in eggs and milk. Then the extract is evapor...