Rapid abrasion test to indicate lead on the surface of ceramicware.
A rapid abrasion test (RAT) was developed for screening ceramicware for Pb. A Pb-sensitive chromogen (rhodizonic acid) reacts to form a persistent colored complex, indicating the presence of Pb. RAT takes 2-5 min to complete; a positive test is easily discernible. RAT, which provides only qualitative information, is useful for screening large numbers of ceramicware items for the presence of Pb at > or = 0.05 microgram/mL.
U.S. Food and Drug Administration, Elemental Research Branch, Washington, DC 20204.
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D002516:Ceramics / Q000032:analysis*; D002863:Chromogenic Compounds; D003124:Colorimetry / Q000379:methods; D003512:Cyclohexanones; D007854:Lead / Q000032:analysis*; D013052:Spectrometry, X-Ray Emission; D013499:Surface Properties
D002863:Chromogenic Compounds; D003512:Cyclohexanones; C005690:rhodizonic acid; D007854:Lead