The simultaneous determination of Quinoline Yellow (E-104) and Sunset Yellow (E-110) in syrups and tablets by second derivative spectrophotometry
A very simple spectrophotometric method using measurements at zero-crossing wavelength is described for resolving binary mixtures of the food dyes, Sunset Yellow (E-110) and Quinoline Yellow (E-104). Calibration graphs are linear up to 15.0 $\mu gml^{-1}$ of Sunset Yellow (r = 0.9998), and Quinoline...
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Published in | Turkish journal of chemistry Vol. 26; no. 4; pp. 501 - 508 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
TÜBİTAK
2002
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Subjects | |
Online Access | Get full text |
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Summary: | A very simple spectrophotometric method using measurements at zero-crossing wavelength is described for resolving binary mixtures of the food dyes, Sunset Yellow (E-110) and Quinoline Yellow (E-104). Calibration graphs are linear up to 15.0 $\mu gml^{-1}$ of Sunset Yellow (r = 0.9998), and Quinoline Yellow (r = 0.9999). The assay procedure for E-110 and E-104 in pharmaceutical products involves the extraction of the dyes with AcOH/NaOAc buffer solution (pH = 4.5), filtration, and measurement of the second derivative absorbance values at 410.0 nm for E-104 and 533.1 nm for E-110. This method was used for determining synthetic mixtures of these dyes in different ratios and it was successfully applied to two commercial products without a previous separation step. |
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Bibliography: | TMUH |
ISSN: | 1300-0527 1303-6130 |