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Abstract: In our work the chromium content of foodstuffs, spices, beverages and nutrition supplements was determined. We set out to determine in what quantity these satisfy the organism’s daily chromium requirement. We wanted to get an answer about to the question if a sportsman wants to plan his diet from the chromium consumption point of view, does he believe that the data given satisfy the necessary essential amount of chromium content. The results obtained were compared to data published by other authors and data can be found in the Internet. These data do not only differ significantly from the results obtained by us, but from each other as well. At present there is no available literature data to us demonstrating whether toxic chromium compounds can occur from the natural Cr(III) content of cereal milling products used when baking and toasting bread, that is why we considered examining it. [Copyright &y& Elsevier]

The acid-base properties of 2-[2-(4-methoxy-phenylamino)-vinyl]-1,3,3-trimethyl-3H-indolium dye were investigated. The reagent exists in a reactive single charged form over a wide range of acidity, from pH 8 to -2.5 H0. The optimum analytical wavelength of the single charged form is 412 nm, where the molar absorptivity is 4.06 x 104 dm³ mol-1 cm-1. Mechanisms of protonation and hydrolysis were discussed. The results suggest the applicability of the dye as an effective analytical reactant. Quantum chemical calculations of the structural and spectral properties of the dye were also carried out. [ABSTRACT FROM AUTHOR]