Table 2.

Assay results for the determination of IB and PA in their combined tablets.

% of label claim (mean ± SD, n = 6)
Method	Alaxan		Dibulaxan		Febro
	IB	PA	IB	PA	IB	PA
HPLC	99.4 ± 0.9	99.8 ± 0.9	99.8 ± 1.3	99.4 ± 1.0	100.3 ± 1.0	99.3 ± 1.2
Derivative transform
1D spectra	99.5 ± 0.9	100.1 ± 1.4	100.3 ± 1.7	99.6 ± 1.3	99.4 ± 0.9	99.3 ± 1.3
1D ratio spectra	99.8 ± 1.3	99.1 ± 1.1	100.2 ± 1.5	99.3 ± 0.9	99.4 ± 1.5	100.1 ± 1.4
Wavelet transform
Sym6-spectra	100.3 ± 1.8	99.6 ± 1.3	100.3 ± 1.5	99.4 ± 1.2	100.6 ± 0.8	99.1 ± 1.0
Haar-spectra	99.3 ± 1.3	99.1 ± 1.2	100.3 ± 0.9	99.7 ± 1.7	100.5 ± 1.2	99.4 ± 0.9
Mexh-spectra	101.0 ± 1.2	100.7 ± 0.8	100.5 ± 1.8	98.8 ± 1.3	99.4 ± 0.9	99.6 ± 1.1
Sym6-ratio spectra	100.1 ± 1.1	99.1 ± 1.3	99.4 ± 0.9	100.4 ± 0.9	99.2 ± 1.1	99.8 ± 0.9
Haar-ratio spectra	99.7 ± 0.9	99.3 ± 0.6	100.1 ± 1.0	99.6 ± 1.1	100.6 ± 1.3	99.5 ± 1.1
Derivative-Wavelet transforms combined
Sym6-1D spectra	100.8 ± 1.4	100.0 ± 1.0	99.7 ± 1.2	101.0 ± 1.1	99.5 ± 1.4	100.5 ± 0.9
Haar-1D spectra	99.5 ± 0.8	99.5 ± 1.0	100.7 ± 1.1	100.9 ± 1.3	100.7 ± 0.8	99.8 ± 0.8
Mexh-1D spectra	99.7 ± 1.0	99.5 ± 0.9	99.8 ± 1.3	100.2 ± 1.5	99.7 ± 0.9	99.8 ± 1.2
1D-Sym6 spectra	100.5 ± 1.1	100.5 ± 0.8	99.8 ± 1.5	99.3 ± 1.4	100.6 ± 0.8	100.0 ± 1.1
1D-FWT spectra	99.9 ± 1.4	100.4 ± 1.3	100.1 ± 1.3	99.9 ± 1.2	100.4 ± 1.1	100.4 ± 1.0
Sym6-FWT spectra	100.7 ± 1.1	100.3 ± 0.9	100.4 ± 1.1	99.7 ± 1.4	99.6 ± 0.9	100.1 ± 0.9
Haar-FWT spectra	99.8 ± 1.3	99.9 ± 1.0	99.7 ± 1.5	100.1 ± 1.0	100.4 ± 1.2	100.6 ± 1.0
Mexh-FWT spectra	100.3 ± 0.9	99.6 ± 1.4	99.5 ± 1.6	100.7 ± 0.8	100.6 ± 0.8	99.7 ± 1.3