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Factorial analysis optimization of a Diltiazem kinetic spectrophotometric quant...
Leitão, João M. M.; Silva, Joaquim C. G. Esteves daA Diltiazem kinetic spectrophotometric method was optimized by factorial analysis. The experimental method is based on a two-stage reaction of Diltiazem with hydroxylamine and a ferric salt: in the first stage there is a hydroxamic acid formation; and, in the second stage there is a red colour complex ferric hydroxamate formation. The variables under investigation were: solvent; hydroxylamine, sodium hydroxide ...
PARAFAC2 and MCR-ALS quantification of Diltiazem antihypertensor based on a kin...
Leitão, João M. M.; Silva, Joaquim C. G. Esteves daA Diltiazem kinetic spectrophotometric UV-Vis method, based on a reaction of the Diltiazem with hidroxylamine and a ferric salt, was used for the quantification of Diltiazem in different pharmaceutical formulations. This method is based on the acquisition of three-way data structures [wavelength (nm) × time (s) × concentration (mg/L)] followed by chemometric analysis by an appropriate PARAFAC2 or MCR-ALS second...
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