Zaporožskij Medicinskij Žurnal (Jun 2017)
The development and validation of HPLC-DMD method for intermediate products impurities determination of morpholinium 2-((4-(2-methoxyphenyl)-5-(pyridine-4-yl)-4H-1,2,4-triazole-3-yl)thio)acetate in bulk drug
Abstract
Purpose. A development and validation of new sensitive, high efficient and selective HPLC determination method of intermediates technological contaminations in bulk drug of morpholin-4-ium 2-((4-(2-methoxyphenyl)-5-(pyridine-4-yl)-4H-1,2,4-triazole-3-yl)thio)acetate (active pharmaceutical ingredient – API). Materials and methods. LC System was Agilent 1260 Infinity (degasser, binary pump, autosampler, column thermostat, diode array detector) Open LAB CDS Software. Column was Zorbax SB-C18; 30 mm × 4.6 mm; 1.8 µm. Injection volume was 5 µL. Isocratic mode. The mobile phase was water/acetonitrile (84:16) with 0.1 % methanoic acid. Standard samples were morpholinium 2-((4-(2-methoxyphenyl)-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetate, pyridine-4-carbohydrazide, 2-isonicotinoyl-N-(2-methoxyphenyl)hydrazine-1-carbothioamide, 4-(2-methoxyphenyl)-5-(pyridin-4-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione. Results. A new criterion for choosing chromatographic separation condition was proposed. It is absolute value of retention factors differences (|Δk|). Six different curves which show dependence of absolute value of retention factors differences (|Δk|) for each compound from the acetonitrile in mobile phase was built at registration of the signal on diode-array detector. A chromatographic separation optimal condition of impurities and API in drug bulk was found with satisfied resolution. UV spectra of API and impurities were determined. Method of the quantitative determination of the impurities was elaborated. Total sample preparation uncertainty was predicted. Method was validated according to European and Ukrainian Pharmacopeia. It was applied for real bulk drug samples. Conclusions. Chromatography separation of impurities and API was done. A method was complied with linearity criteria, specificity, precision and accuracy. The results of impurity determination in bulk drug indicated, that method can be used for the quality control of bulk drug.
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