Optimisation and validation of HPLC method for simultaneous quantification of rifampicin,isoniazid,pyrazinamide,and ethambutol hydrochloride in anti-tuberculosis 4-FDC tablet

High-performance liquid chromatography (hplc) method has been developed and validated for the simultaneous quantification of four components,namely rifampicin (rif),isoniazid (inh),pyrazinamide (pyr),and ethambutol hydrochloride (etm),contained in anti-tuberculosis drugs in fixed dose combination tablet (4-fdc). in order to increase the sensitivity of emb,the pre-column derivatization technique with phenethyl isocyanate (peic) was carried out. the separation was accomplished using waters symmetry c8 (250× 4.6 mm i.d.; 5 μm) at 30°c. the mobile phase used was a mixture of acetonitrile and 20 mm phosphate buffer solution (ph 6.8) containing triethylamine and delivered at 1.5 ml/minute using gradient elution. theuv detector was set at 210 nm. the method was validated in terms of selectivity,linearity,accuracy,precision,detection limit,quantification limit,and robustness according to international conference on harmanization (ich). the optimized method is succcesfully used for quantitative analysis of rif,inh,pyr and etm in 4-fdc tablets. the level of these drugs in 4-fdc tablets were in accordance to that specified in indonesian pharmacopeia. © 2015 penerbit utm press. all rights reserved.