In this study, amine functionalized Kit-6 silica mesoporous magnetite nanocomposite (NH2-MMNC) was synthesized by chemical methods and used as an efficient and recoverable adsorbent for removal of Ponceau 4R, as a toxic dye, from aqueous solutions. The synthesized nanocomposites were characterized by XRD, FT-IR, BET and SEM instruments. The effect of various experimental parameters on the dye r...

Selected synthetic food dyes (tartrazine, Ponceau 4R, Brilliant Blue, orange yellow, and azorubine) were isolated from liquid preparations (mouthwashes and beverages) by Solid Phase Extraction on aminopropyl-bonded silica with diluted aqueous sodium hydroxide as an eluent. The extraction step was followed by thin layer chromatography on silica gel 60 with chloroform-isopropanol-25% aq. ammonia ...

Synthetic food colours are used worldwide to avoid the loss of original colour in processed foods, as well as to make the products more attractive to consumers. Synthetic food colours are considered superior to natural food colours in terms of their colour value, uniformity, and applicability in various processed foods. Synthetic food colours have been authorized and regulated for use in food a...

A new kinetic method is described for the determination of ultramicro amounts of Cu(II) based on its catalytic effect on the oxidation of trisodium-2-hydroxy-1-(4-sulphonato-1-naphthylazo)naphthalene-6,8-disulphonato (red artificial color PONCEAU 4R) by hydrogen peroxide in borate buffer (B.B.) The detection limit given by Perez-Bendito is 0.8 ng/cm3, but the detection limit that we experimenta...

Eleven organic synthetic dyes, currently or formerly used as food colours in Brazil, were tested to determine their effect on mitochondrial respiration in mitochondria isolated from rat liver and kidney. The compounds tested were: Erythrosine, Ponceau 4R, Allura Red, Sunset yellow, Tartrazine, Amaranth, Brilliant Blue, Blue, Fast Red E, Orange GGN and Scarlet GN. All food colours tested inhibit...

Here, we propose a concept of immobilized sorption-colorimetric microprobes for preconcentration and sensing colored analytical forms. Individual particles sorbents distributed over small area 1 mm × attached to an easy-to-made strip with adhesive layer were considered as the probes producing colorimetric responses through These then directly recorded scanner at 1200 dpi, separated from backgro...

There are very few studies evaluating the exposure of general population to food colours. This study aimed estimate Theoretical Maximum Daily Intake (TMDI) by Brazilian four rather seldom-used synthetic colours: Azorubine, Erythrosine, Indigotine, and Ponceau 4R. The was conducted using data from two most recent National Household Budget Surveys (carried out in 2008/2009 2017/2018). covered cou...