Pl. Lopezdealba et al., THE RESOLUTION OF DYE BINARY-MIXTURES BY BIVARIATE CALIBRATION USING SPECTROPHOTOMETRIC DATA, Analytical letters, 29(3), 1996, pp. 487-503
A new, simple spectrophotometric method for resolution of dye binary m
ixtures is proposed in this work. A simple mathematical algorithm was
designed, in which the data are used from four linear regression calib
ration equations: two calibrations for each component at two selected
wavelengths. The method of Kaiser was applied for the selection of the
optimum two-wavelength sets for all mixtures under study. The recover
y experiments were carried out in ten mixtures of the following dyes:
Tartrazine, Amaranth, Erythrosin B, Sunset Yellow and Allura Red. The
obtained results were compared with the results of a commonly used der
ivative spectrophotometric procedure (zero-crossing technique). The st
atistical evaluation of the method bias was performed and it was concl
uded that the proposed methodology may be competitive with the derivat
ive procedure for the resolution of such dye binary mixtures.