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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...
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