Continuous wavelet and derivative transform applied to the overlapping spectra for the quantitative spectrophotometric multi-resolution of triamterene and hydrochlorothiazide in triamterene-H tablets.

In present paper, continuous wavelet transform as well as first and second derivative spectrophotometry methods are proposed for simultaneous quantitative analysis of triamterene and hydrochlorothiazide without the time-consuming extraction step. In the wavelet transform method, different wavelet families were tested and subsequently coiflets wavelet family (coif1) and reverse biorthogonal wavelet family (rbio 2.8) were selected and applied under the optimal conditions for simultaneous analysis.