Document Detail


Nondestructive determination of lead, cadmium, tin, antimony, and barium in ceramic glazes by radioisotope X-ray fluorescence spectrometry.
MedLine Citation:
PMID:  8823923     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Quantitation capabilities of radioisotope X-ray fluorescence spectrometry (RXRFS) for determining lead, cadmium, tin, antimony, and barium in ceramic glazes were investigated. Twenty-one air-dried glazes and 85 fired glazes on test tiles were analyzed by using 109Cd and 57Co excitation sources. Accurate Pb determinations, with limits of detection (LODs) of about 0.3 mg/cm2 for 5 min counting times, were achieved by using the 75 keV K alpha 1 X-ray photopeak and a Pb foil calibration procedure. Cd, Sn, Sb, and Ba concentrations were determined with LODs from about 0.5 to 1.5 mg/cm2. For Pb and Ba, results obtained by using absorption corrections based only on element concentrations determined by RXRFS and an iterative approach led to analytical biases of < or = 4% relative to results obtained by using corrections based on known total element compositions. Biases were more severe for Cd, Sn, and Sb because lower X-ray energies were involved and sensitivities varied as a function of matrix Pb content. Pb concentrations were above LODs (1.3-40 mg/cm2) in 39 of 47 fired "food-safe" glazes and in 33 of the other 38 fired glazes (0.4-39 mg/cm2).
Authors:
D L Anderson; W C Cunningham
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of AOAC International     Volume:  79     ISSN:  1060-3271     ISO Abbreviation:  J AOAC Int     Publication Date:    1996 Sep-Oct
Date Detail:
Created Date:  1996-12-02     Completed Date:  1996-12-02     Revised Date:  2008-03-17    
Medline Journal Info:
Nlm Unique ID:  9215446     Medline TA:  J AOAC Int     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1141-57     Citation Subset:  IM    
Affiliation:
U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, Washington, DC 20204, USA.
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MeSH Terms
Descriptor/Qualifier:
Absorption
Antimony / analysis*
Barium / analysis*
Cadmium / analysis*
Ceramics / chemistry*
Isotope Labeling
Lead / analysis*
Reference Standards
Spectrometry, X-Ray Emission
Tin / analysis*
Chemical
Reg. No./Substance:
0/Ceramics; 7439-92-1/Lead; 7440-31-5/Tin; 7440-36-0/Antimony; 7440-39-3/Barium; 7440-43-9/Cadmium

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