TY - JOUR
T1 - Oxidative degradation of food dye E133 Brilliant Blue FCF
T2 - Liquid chromatography-electrospray mass spectrometry identification of the degradation pathway
AU - Gosetti, F.
AU - Gianotti, V.
AU - Angioi, S.
AU - Polati, S.
AU - Marengo, E.
AU - Gennaro, M. C.
PY - 2004/10/29
Y1 - 2004/10/29
N2 - This paper is devoted to the evaluation of the degradation pathway of the E133 Brilliant Blue FCF (C.I. 42090) that is largely used in the food industry. The degradation is studied in oxidation conditions obtained by addition of potassium persulfate at different persulfate to dye molar ratios under natural sunlight irradiation. The degradation pathway of the dye passes through a species coloured in dark blue and then gives rise to uncoloured species. Due to the low volatility and the poor thermal stability of the dye, reversed-phase liquid chromatography associated to mass spectrometry and tandom mass spectrometry was employed to follow the kinetics of degradation and identify some intermediates. The identification of organic species still present in the decoloured dye and the value of COD obtained in these conditions show evidence that complete decolorization does not correspond to complete mineralisation. No direct information of toxicity is available for the uncoloured degradation products but the further formation of aromatic amines can not be excluded.
AB - This paper is devoted to the evaluation of the degradation pathway of the E133 Brilliant Blue FCF (C.I. 42090) that is largely used in the food industry. The degradation is studied in oxidation conditions obtained by addition of potassium persulfate at different persulfate to dye molar ratios under natural sunlight irradiation. The degradation pathway of the dye passes through a species coloured in dark blue and then gives rise to uncoloured species. Due to the low volatility and the poor thermal stability of the dye, reversed-phase liquid chromatography associated to mass spectrometry and tandom mass spectrometry was employed to follow the kinetics of degradation and identify some intermediates. The identification of organic species still present in the decoloured dye and the value of COD obtained in these conditions show evidence that complete decolorization does not correspond to complete mineralisation. No direct information of toxicity is available for the uncoloured degradation products but the further formation of aromatic amines can not be excluded.
KW - Degradation
KW - HPLC-MS
KW - Persulfate oxidation
KW - Triphenylmethane dyes
UR - http://www.scopus.com/inward/record.url?scp=7444254910&partnerID=8YFLogxK
U2 - 10.1016/j.chroma.2004.07.106
DO - 10.1016/j.chroma.2004.07.106
M3 - Article
SN - 0021-9673
VL - 1054
SP - 379
EP - 387
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1-2
ER -