QUICK COLOR TEST TO DETECT LEAD RELEASE FORM GLAZED CERAMIC AND ENAMELED METAL WARE

A color test is presented for the purpose of quickly identifying glazed ceramic and/or enameled metal ware which releases excessive Pb. Citric acid solution on filter paper is used to extract Pb from the ware and a Pb sensitive chromogen indicates the presence of Pb on the paper. The quick color tes...

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Bibliographische Detailangaben
1. Verfasser:	GOULD, JOHN, H
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A color test is presented for the purpose of quickly identifying glazed ceramic and/or enameled metal ware which releases excessive Pb. Citric acid solution on filter paper is used to extract Pb from the ware and a Pb sensitive chromogen indicates the presence of Pb on the paper. The quick color test takes approximately 30 minutes and is useful of screening ware for testing by the 24 hour AOAC/ASTM method. L'invention concerne un test de couleur permettant l'identification rapide de vaisselle céramique vitrifiée et/ou métallique émaillée libérant du Pb de manière excessive. On utilise une solution d'acide citrique sur du papier filtre afin d'extraire du Pb de la vaisselle, un chromogène sensible au Pb indiquant la présence du Pb sur le papier. Le test de couleur rapide prend approximativement 30 minutes et est utile pour sélectionner de la vaisselle à tester selon le procédé ADAC(ASTM) de 24 heures.