期刊
ENVIRONMENTAL POLLUTION
卷 148, 期 2, 页码 627-633出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2006.11.013
关键词
XRF; treated wood; arsenic; handheld
资金
- NIEHS NIH HHS [P50 ES012736, P50 ES012736-04] Funding Source: Medline
The objective of this study was to evaluate the performance of handheld XRF analyzers on wood that has been treated with a preservative containing arsenic. Experiments were designed to evaluate precision, detection limit, effective depth of analysis, and accuracy of the XRF arsenic readings. Results showed that the precision of the XRF improved with increased sample concentration and longer analysis times. Reported detection limits decreased with longer analysis times to values of less than I mg/kg or 18 mg/kg, depending on the model used. The effective depth of analysis was within the top 1.2 cm and 2.0 cm of sample for wood containing natural gradients of chemical preservative and concentration extremes, respectively. XRF results were found to be 1.5-2.3 times higher than measurements from traditional laboratory analysis. Equations can be developed to convert XRF values to results which are consistent with traditional laboratory testing. (c) 2006 Elsevier Ltd. All rights reserved.
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