Showing papers on "Tartrazine published in 2000"

Treatment and Decolorization of Dyes in an Anaerobic Baffled Reactor

Abstract: Synthetic organic colorants, the majority of which are recalcitrant in nature, are used universally in many different manufacturing processes. The dyes are released into the environment in industrial effluents and are highly visible even at low concentrations ( 20 g/L) to inhibitory (IC\D50\N = 0.2 mg/L). Batch biodegradability assays indicated that the dyes were not readily utilized by the anaerobic microorganisms as a sole substrate. Decolorization of the dye tartrazine was investigated in a laboratory-scale anaerobic baffled reactor at a concentration of 250 mg/L. Reduction in COD of 50–60% and color reduction of about 95% was achieved. Initially the tartrazine was not readily decolorized; however, decolorization improved with acclimation of the biomass. An industrial wastewater from a food dye manufacturer was fed to a second laboratory-scale anaerobic baffled reactor at a concentration of 5% (volume-to-volume ratio) and then increased to 10%. Anaerobic degradation of the wastewater was efficient. Methanogenic activity was high; the organic content of the influent was reduced by about 70%, and color was reduced by almost 90%.

Allergy to Tartrazine in Psychotropic Drugs.

Abstract: Background High psychiatric morbidity has been reported among those who complain of food intolerance or allergy. Many cases of food allergy or intolerance to drugs are not due to allergy to the food or drugs themselves, but to the additives used for coloring, flavoring, preserving, thickening, emulsifying, or stabilizing the product. Of various coloring dyes used, tartrazine (FD & C yellow no. 5) is the color most frequently incriminated in producing allergic reactions. The exact epidemiology and pattern of allergic reactions to tartrazine in psychotropic drugs have not been frequently studied and reported. Method The present study included consecutive outpatients (May 1996 to April 1998) who developed allergic reactions or intolerance to tartrazine in psychotropic drugs. Total patients exposed to tartrazine-containing drugs were also recorded. The subjects showing allergic reactions to tartrazine were then exposed to non-tartrazine-containing brands. Results Of 2210 patients exposed to tartrazine-containing drugs, 83 (3.8%) developed allergic reactions. The symptoms subsided within 24 to 48 hours of stopping the drug. None of the patients showed allergy to non-tartrazine-containing brands. History of allergy to tartrazine was present in 13.2%, and 15.7% of patients had a history of aspirin sensitivity. Conclusion Tartrazine allergy should be considered in patients developing drug allergy, because it would require changing the brand rather than stopping treatment with that drug.

Simultaneous Analytical Techniques for Determination of 8 Synthetic Food Colors in Foods by HPLC

Abstract: This Study has been carried out to develop a method of analysis of 8 permitted synthetic food colors [including Brilliant Blue FCF(B1), Indigocarmine (B2), Fast green FCF(G3), Amaranth (R2), Erythrosine (R3), Allura red (R40), Tartrazine (Y4), Sunset Yellow FCF (Y5)] in Korean foods by HPLC. After adjusting to 0.5% HCl, each of the food colors extracted was eluted by Sep-pak cartridge. Eluates were then determined by high performance liquid chromatograph with a UV-VIS detector. Recoveries of the 8 synthetic food colors were found to be 81.2-98.0% for soft drinks, 80.6-96.1% for candy, 79.8-96.3% for chewing gum, 76.5-91.7% for cereals, 79.9-93.8% for ice cream and 78.6-94.7% for jelly, respectively. The detection limits were .

Degradation of food dyes in the anaerobic baffled reactor

Abstract: Dyes and pigments are usually released into the environment in the form of a dispersion or a true solution in industrial effluents. The presence of very small amounts of dyes in water ( 20 g/L) to inhibitory (IC50 = 0.2 mg/L). Tartrazine decolourisation was investigated in a laboratory-scale ABR at a concentration of 250 mg/L. Reduction in COD of 50 to 60 % and colour reduction of ca. 95 % was achieved. An industrial dye wastewater was fed to a second laboratory-scale ABR at a concentration of 5 % (v/v) and then increased to 10 % (v/v). Anaerobic degradation of the wastewater was efficient. Methanogenic activity was high, the organic content of the influent was reduced by ca. 70 % and colour was reduced by almost 90 %. FISH techniques were used to monitor microbial population dynamics.