The further chemistry of ellagic acid II. Ellagic acid and water-soluble ellagates as metal precipitants

Title: The further chemistry of ellagic acid II. Ellagic acid and water-soluble ellagates as metal precipitants
Creator: Przewloka, Simon; Shearer, B. J.
Date: 2002
Type: Text; Journal article
Identifier: http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/34362
Identifier: vital:723
Identifier: https://doi.org/10.1515/HF.2002.003
Identifier: ISSN:0018-3830
Abstract: Preparations of the previously unreported, water-soluble, tetraguanidinium, tetracholine and tetrakisbenzyltrimethylammonium ellagates are outlined. Ellagic acid and these water-soluble salts remove Mg2+, Ca2+ and Mn2+ ions from dilute aqueous solutions at pH greater than 7. The salts also remove Fe2+, Fe3+, Co2+ and Cu2+ between pH 3 and pH 6. At pH 1 the water-soluble ellagates underwent hydrolysis, resulting in the precipitation of free ellagic acid in preference to the formation of metal-ellagate complexes. These trends were also observed when mixtures of metal ions were applied.
Publisher: Walter de Gruyter
Relation: Holzforschung Vol. 56, no. 1 (2002), p. 13-19
Rights: Copyright Walter de Gruyter
Rights: This metadata is freely available under a CCO license
Subject: 0705 Forestry Sciences; Chelation; Ellagic acid; Metal precipitants; Metal-ellagate complexes; Water-soluble ellagates; Hydrolysis; pH effects; Positive ions; Precipitation; Solubility; Metal ions; Acids; Cations; Ph
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