N. Karali et al., SIMULTANEOUS DETERMINATION OF MEDAZEPAM AND HYOSCINE BUTYLBROMIDE IN TABLETS BY 2ND-DERIVATIVE ULTRAVIOLET SPECTROMETRY, Il Farmaco, 53(1), 1998, pp. 62-64
A second-derivative UV spectrophotometric method for the simultaneous
determination of medazepam and hyoscine butylbromide in sugar-coated t
ablets without prior separation is described. In the derivative spectr
ophotometric determination of these drugs, calibration graphs were obt
ained by plotting peak-trough amplitudes at 252.6 and 264.8 nm versus
concentration of medazepam and zero-crossing amplitude at 212.5 nm ver
sus concentration of hyoscine butylbromide. The relative standard devi
ation of the method was found to be +/-0.56% for medazepam and +/-0.08
% for hyoscine butylbromide. This method has been successfully applied
to tablets containing medazepam and hyoscine butylbromide. (C) 1998 E
lsevier Science S.A.