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Type: Artigo de periódico
Title: Assessment Of The Breakdown Products Of Solar/uv Induced Photolytic Degradation Of Food Dye Tartrazine.
Author: dos Santos, Tuane Cristina
Zocolo, Guilherme Julião
Morales, Daniel Alexandre
Umbuzeiro, Gisela de Aragão
Zanoni, Maria Valnice Boldrin
Abstract: The food dye tartrazine (CI 19140) was exposed to UV irradiation from an artificial source, a mercury vapor lamp, and a natural one, sunlight. It was observed that conditions such as energy dose, irradiation time, pH and initial dye concentration affected its discoloration. There was 100% of color removal, after 30min of irradiation, when a dye solution 1×10(-5)molL(-1) was submitted to an energy dose of 37.8Jcm(-2). Liquid Chromatography coupled to Diode Array Detection and Mass Spectrometry confirmed the cleavage of the chromophore group and the formation of five by-products at low concentration. Although by-products were formed, the Salmonella/microsome mutagenicity assay performed for both, the dye solution at a dose of 5.34mg/plate and the solutions obtained after exposure to UV irradiation, did not present mutagenic activity for TA98 and TA100 with and without S9.
Subject: Chromatography, High Pressure Liquid
Chromatography, Liquid
Food Coloring Agents
Hydrogen-ion Concentration
Mutagenicity Tests
Salmonella Typhimurium
Tandem Mass Spectrometry
Ultraviolet Rays
Breakdown Products
Dye Photolysis
Rights: fechado
Identifier DOI: 10.1016/j.fct.2014.03.025
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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