Abstract
Ultraviolet (UV)–derivative spectrophotometry, bivariate calibration algorithm, and Vierodt methods were applied to simultaneous determination of ranitidine (R) and amoxicillin (AMX) in binary mixtures. The first-order derivative allows determination of R in the concentration range 4.0 · 10−6 mol · dm−3 to 6.0 · 10−5 mol · dm−3. Vierordt method enables Ranitidine assaying in the presence of 2.5-fold excess of AMX and 3-fold excess of R. The bivariate calibration method obeys Beer's law in the concentration ranges 4.0 · 10−6 mol · dm−3 to 6.0 · 10−5 mol · dm−3 for R and 2.0 · 10−6 to 2.0 · 10−5 mol · dm−3 for AMX.
Notes
*in ratio to declared value