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Simple and fast spectrophotometric methods for the determination of the components of ternary mixtures of dyes have been proposed. For the simultaneous determination of Sunset Yellow (E110), Tartrazine (E102), and Ponceau 4R (Ł124) in granulated drinks partial least square (PLS) method was applied to the spectrophotometric data in the range 400-600 nm, at 10 nm intervals. In the procedure 27 standard...
Simultaneous determination of Cu(II) and Zn(II) by partial least square calibration has been described. Murexide has been used as chromogenic reagent. Beta-correction technique has been used to optimize the variables influencing the system and to resolve the spectrum of ligand from the spectra of its copper and zinc complexes. Total relative error obtained with PLS method for 16 synthetic samples...
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