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Title
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Heterogeneity effects in direct X-ray fluorescence analysis of hair
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Author
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Abstract
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| The methodology of direct hair analysis by energy-dispersive x-ray fluorescence was studied. The effect on the XRF result of having a non-homogeneous radial distribution of the analyte in a single hair strand and the macroscopic effects in a bundle of hairs were calculated to evaluate possible systematic errors. The detection limits were mapped as a function of the target thickness and surface fraction. It appeared that a 10 mg cm−2 sample thickness, i. e. a target with about four layers of hair strands, is recommended. The standard deviation of this simple direct analytical method is 619% for some important elements. Discrepancies with neutron activation analysis had a mean value of around 15%. About twelve elements can be determined simultaneously on a routine basis. |
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Language
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English
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Source (journal)
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X-ray spectrometry. - London
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Publication
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London
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1984
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ISSN
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0049-8246
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DOI
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10.1002/XRS.1300130106
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Volume/pages
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13
:1
(1984)
, p. 27-32
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ISI
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A1984SB70200004
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Full text (Publisher's DOI)
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