Rapid spectrophotometric method to resolve ternary mixtures of Tartrazine, Quinoline Yellow and Patent Blue V in commercial products

被引：8

作者：

Berzas Nevado J.J. ^{[1
]}

Rodríguez Flores J. ^{[1
]}

Villaseñor Llerena M.J. ^{[1
]}

Rodríguez Fariñas N. ^{[1
]}

机构：

[1] Department of Analytical Chemistry and Food Technology, University of Castilla La Mancha

来源：

Fresenius' Journal of Analytical Chemistry | 1999年 / 365卷 / 4期

关键词：

HPLC; Detection Limit; Confidence Level; Commercial Product; Quinoline;

D O I：

10.1007/s002160051507

中图分类号：

学科分类号：

摘要：

A very simple spectrophotometric method is described for resolving ternary mixtures of the food dyes Tartrazine (E-102), Quinoline Yellow (E-104) and Patent Blue V (E-131) by using the second derivative of the spectra with measurements at zero-crossing wavelengths. Calibration graphs are linear up to 20.0 mg/L of Tartrazine, up to 20.0 mg/L of Quinoline Yellow and up to 6.4 mg/L of Patent Blue V. Repeatability and reproducibility studies (with the Students's and F tests) were achieved for two series of nine standards for each dye showing no significant differences at the 95% confidence level. Detection limits of 0.0526, 0.0164 and 0.0034 mg/L were obtained for Tartrazine, Quinoline Yellow and Patent Blue V, respectively. This method was used for determining synthetic mixtures of these colorants in different ratios and it was successfully applied to four commercial products without previous separation step. The results found in commercial products were compared with those obtained by an HPLC method and very similar values were found for both methods. © Springer-Verlag 1999.

引用

页码：383 / 388

页数：5

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