Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/195067
Type: Artigo de periódico
Title: Soapstone (steatite) Cookware As A Source Of Minerals.
Author: Quintaes, K D
Amaya-Farfan, J
Morgano, M A
Mantovani, D M B
Abstract: Steatite or soapstone, is a soft metamorphic rock composed mainly of talc, dolomite and actinolite, which is abundantly found and used for the manufacture of cookware in south-east Brazil. The study estimates its usage for cookware among dwellers of Ouro Preto, and assesses the possible toxicological or nutritional impact on food preparation. Pans made of steatite were purchased both in the crude (n = 6) and 'cured'forms (n = 6). Migration of Ca, Fe, Mg, Mn, Co, Al, Cr, Ni, Pb and Cd was determined for 20 sequential cooking trials, using 3 and 5% acetic acid as a food simulant. Analytical determinations were carried out by inductively coupled plasma atomic-emission spectrometry and the data treated by an individual model of random effects, simple linear regression and Pearson's correlation. About 81% of Ouro Preto's native population own soapstone cookware and, of these, 79% use the pans regularly. Mineral migration followed the general solubility of the crystalline components of the rock. Therefore, Ca, Mg, Fe and Mn were, in that order, the elements that exhibited highest migration, whereas the remaining were seen in negligible levels, except for Ni in the crude pans. The 5% solution favoured migration, whereas curing tended to restrict migration and extend durability of the pan. It is concluded that while cured soapstone pans do not offer mineral toxicity, they may contribute to the mineral nutrition of human beings.
Subject: Cooking
Food Contamination
Humans
Hydrogen-ion Concentration
Magnesium Oxide
Nutritional Physiological Phenomena
Silicon Dioxide
Solubility
Trace Elements
Citation: Food Additives And Contaminants. v. 19, n. 2, p. 134-43, 2002-Feb.
Rights: fechado
Identifier DOI: 10.1080/02652030110066206
Address: http://www.ncbi.nlm.nih.gov/pubmed/11824418
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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