Studies on the Photochemical Fluorimetry(Ⅵ)——Determination of Dye-Mixtures by Using Differential Rate Kinetic Photochemical Fluorimetry

Abstract

Abstract: Photochemical fluorimetric methods for the determination of Azo-dyes, Amaranth (AM) and Direct Sun-resisting Light Yellow(DY) are described.Adifferential rate method is uesd for resolution of mixtures of these dyes.The principle of these methods are discussed.Linear calibration curves are obtained over the ranges of 0～220 ng/mLand 0～120 ng/mLfor AMand DY, respectively (r= 0.999 for both), the limits of determination are 0.64 ng/mL AMand 0.045 ng/mL DY.The relative standard deviation is 1.6%(n=8) and 1.8%(n = 7) for AMand DY, respectively, these methods have been applied to the determination of dye-mixtures with satisfactory results.

Key words: Fluorimetry, Photochemical reaction, Differential rate method, Azo-dyes

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GUO Xiang-qun, XU Jin-gou, CHEN Guo-zhen . Studies on the Photochemical Fluorimetry(Ⅵ)——Determination of Dye-Mixtures by Using Differential Rate Kinetic Photochemical Fluorimetry[J]. Chem. J. Chinese Universities, 1992, 13(4): 450.

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Studies on the Photochemical Fluorimetry(Ⅵ)——Determination of Dye-Mixtures by Using Differential Rate Kinetic Photochemical Fluorimetry

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