Sm. Wu et al., Simultaneous determination of cimetidine, famotidine, nizatidine, and ranitidine in tablets by capillary zone electrophoresis, ELECTROPHOR, 22(13), 2001, pp. 2758-2762
A simple capillary zone electrophoresis (CZE) method is described for the s
imultaneous determination of cimetidine (CIM), famotidine (FAM), nizatidine
(NIZ), and ranitidine (RAN). The analysis of these drugs was performed in
a 100 mm phosphate buffer, pH 3.5. Several parameters were studied, includi
ng wavelength for detection, concentration and pH of phosphate buffer, and
separation voltage. The quantitative ranges were 100-1000 muM for each anal
yte. The intra- and interday relative standard deviations (n = 5) were all
less than 4%. The detection limits were found to be about 10 muM for CIM, 2
0 muM for RAN, 20 muM for NIZ, and 10 muM for FAM (S/N = 3, injection 1 s)
at 214 nm. All recoveries were greater than 92%. Applications of the method
to the assay of these drugs in tablets proved to be feasible.