Simultaneous determination of the colorants sunset yellow FCF and quinoline yellow by solid-phase spectrophotometry using partial least squares multivariate calibration.

Autor: Capitán-Vallvey LF; Department of Analytical Chemistry, University of Granada, Spain., Fernández MD, de Orbe I, Vilchez JL, Avidad R
Jazyk: angličtina
Zdroj: The Analyst [Analyst] 1997 Apr; Vol. 122 (4), pp. 351-4.
DOI: 10.1039/a605057c
Abstrakt: A method for the simultaneous determination of the colorants Sunset Yellow FCF and Quinoline Yellow using solid-phase spectrophotometry is proposed. The colorants were isolated in Sephadex DEAE A-25 gel at pH 5.0, the gel-colorants system was packed in a 1 mm silica cell and spectra were recorded between 400 and 600 nm against a blank. Statistical results were obtained by partial least squares (PLS) multivariate calibration. The optimized matrix by using the PLS-2 method enables the determination of the colorants in artificial mixtures and commercial soft drinks.
Databáze: MEDLINE