Isoniazid (INH) anti-tuberculosis drug was determined spectrophotometrically after derivatizing with 2-hydroxy-1,4-naphthoquinone (HNQ) at pH 3 in aqueous-methanolic solution. The reaction conditions were optimized and the derivative absorbed maximally at 365 nm. The Beer's law was obeyed in the range 5-25 mu g/ml. With coefficient of determination 0.9991. The method was applied for the determination of INH in pharmaceutical preparations with coefficient of variation 0.86-0.98.
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Natl Inst Pharmaceut Res & Dev, Dept Med Chem & Qual Control, Abuja, NigeriaNatl Inst Pharmaceut Res & Dev, Dept Med Chem & Qual Control, Abuja, Nigeria
Afieroho, O. E.
Okorie, O.
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Univ Port Harcourt, Fac Pharmaceut Sci, Pharmaceut & Pharmaceut Technol Dept, Port Harcourt, NigeriaNatl Inst Pharmaceut Res & Dev, Dept Med Chem & Qual Control, Abuja, Nigeria
Okorie, O.
Okonkwo, T. J. N.
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Univ Port Harcourt, Fac Pharmaceut Sci, Dept Pharmaceut & Med Chem, Port Harcourt, NigeriaNatl Inst Pharmaceut Res & Dev, Dept Med Chem & Qual Control, Abuja, Nigeria