Presence of Chromium (VI) in sheepskins: influence of tanney processes

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To access the full text documents, please follow this link: http://hdl.handle.net/2117/13646

dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor.author	Lalueza Baro, Joana
dc.date	1999-04
dc.identifier.citation	Lalueza, J. Presence of Chromium (VI) in sheepskins: influence of tanney processes. "Journal of the Society of Leather Technologists and Chemists", Abril 1999, vol. 83, p. 91-95.
dc.identifier.citation	0144-0322
dc.identifier.uri	http://hdl.handle.net/2117/13646
dc.language.iso	eng
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria química
dc.subject	Àrees temàtiques de la UPC::Enginyeria química::Indústries químiques
dc.subject	Tanning
dc.subject	Hides and skins
dc.subject	Cuirs i pells
dc.subject	Cuirs i pells -- Anàlisi
dc.title	Presence of Chromium (VI) in sheepskins: influence of tanney processes
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	In this work, the results of a preliminary study on the influence exerted by neutralization, washing, ageing and vegetable retanning on chromium (VI) content in sheepskins are presented. In neutralization, the presence of chromium (VI) in skins is observed, in a concentration that depends on the pH to which they have been neutralized. However, chromium (VI) practically disappears once the skins have been fatliquored and thoroughly washed. Analysis of skins not retanned and finished exposed to UV light showed a marked increase in chromium (VI)content. By contrast, skins retanned with quebracho withstood the same conditions without noticeable quantitaties of chromium (VI) being detected. Although the analytical results were obtained using the IUC 18 Standard, an alternative procedure based on the capillary electrophoresis technique was developed to verify the results. This method allowed us to confirm the presence of considerable quantities of chromium (VI) in samples subjected to photoageing

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