“…In order to assure the quality of CPT containing pharmaceutical formulations, several methods have been developed for its determination, including batch fl uorimetry [3], chemiluminescence [4 -7], AAS [8,9], high-performance liquid chromatography (HPLC) [10 -17], GC [18], differential pulse polarography [19], amperometry [20 -22], volumetric titration [23], potentiometric titration [24 -28], capillary electropho-Artigo Article Artigo Article resis [29], conductometry [30], coulometry [31], voltammetry [32] and potentiometry [33].…”