Journal
FOOD CHEMISTRY
Volume 138, Issue 2-3, Pages 1928-1935Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2012.11.126
Keywords
Stopped-flow kinetic analysis; MCR-ALS; Second-order advantage; Food dyes
Funding
- Universidad Nacional del Litoral [12-65]
- CONICET (Consejo Nacional de Investigaciones Cientificas y Tecnicas) [PIP 2988]
- ANPCyT (Agencia Nacional de Promocion Cientifica y Tecnologica) [PICT 2011-0005]
- CONICET
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The performance of MCR-ALS was studied in the modeling of non-linear kinetic-spectrophotometric data acquired by a stopped-flow system for the quantitation of tartrazine in the presence of brilliant blue and sunset yellow FCF as possible interferents. In the present work, MCR-ALS and U-PCA/RBL were firstly applied to remove the contribution of unexpected components not included in the calibration set. Secondly, a polynomial function was used to model the non-linear data obtained by the implementation of the algorithms. MCR-ALS was the only strategy that allowed the determination of tartrazine in test samples accurately. Therefore, it was applied for the analysis of tartrazine in beverage samples with minimum sample preparation and short analysis time. The proposed method was validated by comparison with a chromatographic procedure published in the literature. Mean recovery values between 98% and 100% and relative errors of prediction values between 4% and 9% were indicative of the good performance of the method. (C) 2012 Elsevier Ltd. All rights reserved.
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