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aldehydes derived from furan, the main one being hydroxymethylfurfural, react with barbituric acid and paratoluidine to give a red compound which is determined by colorimetry at 550 nm.
aldehydy odvozené od furanu, z nichž hlavní je hydroxymethylfurfural, reagují s kyselinou barbiturovou a paratoluidinem za vzniku červené sloučeniny, která se stanoví kolorimetricky při 550 nm.
aldehydes derived from furan, the main one being hydroxymethylfurfural, react with barbituric acid and paratoluidine to give a red compound which is determined by colorimetry at 550 nm.1.2.
aldehydy odvozené od furanu, z nichž hlavní je hydroxymethylfurfural, reagují s kyselinou barbiturovou a paratoluidinem a dávají červenou sloučeninu, která se stanoví kolorimetricky při 550 nm.
place 10 g of paratoluidine, c6h4(ch3) nh2, in a 100 ml volumetric flask; add 50 ml of isopropanol, ch3ch(oh)ch3, and 10 ml of glacial acetic acid, ch3cooh (ρ20 = 1,05 g/ml).
do odměrné baňky o objemu 100 ml dejte 10 g paratoluidinu, c6h4(ch3) nh2, přidejte 50 ml isopropanolu ch3ch(oh)ch3 a 10 ml ledové kyseliny octové, ch3cooh (ρ20 = 1,05 g/ml).