[Reduction of lead content and other elements in wine using pectic acid].
A procedure for reducing the Pb content in wines containing high levels of Pb is described. The reduction of Pb by means of pectic acid (PA) depends on the quality grade of the wine. In "Auslese" (wine A) 6250 mg PA/l diminished Pb content in 24 h from 0.88 mg/l to 0.28 mg/l; in "Spätlese" (wine B) from 0.83 mg/l to 0.06 mg/l. Under the same conditions the content of Fe, Zn, Cu decreased in wine A from 8.85 mg/l to 7.05 mg/l, from 4.75 mg/l to 1.25 mg/l, from 0.67 mg/l to 0.57 mg/l and in wine B from 6.70 mg/l to 5.41 mg/l, from 1.17 mg/l to 0.28 mg, 0.46 mg/l to 0.28 mg/l, respectively. PA is removed almost quantitatively by filtration. Sensory properties of treated wines were unchanged with concentrations of PA of 750 mg and 1500 mg/l. A slight effect on taste at 6250 mg PA/l wine cannot be excluded. On account of its high affinity to Pb, PA will probably remove Pb from other liquid foods as well.
D055598:Chemical Phenomena; D002621:Chemistry; D007854:Lead / Q000032:analysis*; D008670:Metals / Q000032:analysis*; D010368:Pectins / Q000032:analysis*; D013997:Time Factors; D014920:Wine / Q000032:analysis*
D008670:Metals; D007854:Lead; D010368:Pectins; C003181:polygalacturonic acid
Verminderung des Gehaltes von Blei und anderen Elementen in Wein mit Hilfe von Pectinsäure.