Co-operative study on the release of lead from crystalware.
The Istituto Superiore di Sanità promoted a study on lead availability from crystalware.
The study was conducted in collaboration with a glass research Institute on glass articles provided by two of the major Italian lead crystal producers.
The whole spectrum of lead-bearing glasses from 7 up to 32% PbO was investigated.
Short-term extraction tests carried out with 4% acetic acid on three sets of 24% PbO stemware of different composition, show that lead release is closely related to the hydrolytic resistance of the glass.
A linear correlation was found between sodium released from the bulk glass and lead released from the surface at any time after the first leach.
Experiments of repeated leaching with wine and brandy showed that lead release decreases with increasing number of extractions, similarly to the decrease observed with 4% acetic acid.
Long-term experiments carried out with brandy on a set of six decanters for three months at room temperature confirmed the well-known square root dependence of lead release with time.
On the basis of these results an estimation of the risk associated with the conditions of consumer use is attempted.
Mots-clés Pascal : Verre cristal plomb, Verre creux, Vaisselle, Propriété chimique, Stabilité chimique, Résistance hydrolyse, Lixiviation, Acétique acide, Produit alimentaire, Boisson alcoolisée, Relation composition propriété, Corrélation, Analyse risque, Toxicité, Plomb Oxyde, Silicium Oxyde, Calcium Oxyde, Baryum Oxyde, Sodium Oxyde, Potassium Oxyde, Bore Oxyde, Système B2O3 BaO CaO K2O Na2O PbO SiO2, B Ba Ca K Na O Pb Si, Système B2O3 K2O Na2O PbO SiO2, B K Na O Pb Si, Système K2O Na2O PbO SiO2, K Na O Pb Si, Système K2O PbO SiO2, K O Pb Si
Mots-clés Pascal anglais : Lead crystal glass, Hollow glass, Table ware, Chemical properties, Chemical stability, Hydrolysis resistance, Lixiviation, Acetic acid, Foodstuff, Alcoholic beverage, Property composition relationship, Correlation, Risk analysis, Toxicity, Lead Oxides, Silicon Oxides, Calcium Oxides, Barium Oxides, Sodium Oxides, Potassium Oxides, Boron Oxides
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0301128
Code Inist : 001D08B06C. Création : 27/11/1998.