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A Quantative Basis for Hair Analysis Using PIXE

Li, Hong-Kou and Akselsson, Roland LU (1985) In Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms 12(2). p.248-256
Abstract
The PIXE technique offers the possibility of scanning a single hair strand longitudinally with a millimetre proton beam for trace elements. However, the accuracy of the method has been questioned since the quantification of the mass concentration has been a serious problem. In this paper a specific beam-hair-detector geometry is assumed, and the correction factor accounting for the proton energy loss and the X-ray absorption in a regular hair is calculated. 43 hair segments from 8 individuals, ranging from 45 to 110 μm in in diameter were analyzed giving a mean value of 4.32% (standard deviation 0.25%) for sulphur, and a mean value of 149 ppm (standard deviation 35 ppm) for zinc. It is shown that the correction is important not only for... (More)
The PIXE technique offers the possibility of scanning a single hair strand longitudinally with a millimetre proton beam for trace elements. However, the accuracy of the method has been questioned since the quantification of the mass concentration has been a serious problem. In this paper a specific beam-hair-detector geometry is assumed, and the correction factor accounting for the proton energy loss and the X-ray absorption in a regular hair is calculated. 43 hair segments from 8 individuals, ranging from 45 to 110 μm in in diameter were analyzed giving a mean value of 4.32% (standard deviation 0.25%) for sulphur, and a mean value of 149 ppm (standard deviation 35 ppm) for zinc. It is shown that the correction is important not only for the determination of the absolute elemental concentrations but also for the determination of their relative longitudinal distributions. The secondary corrections accounting for the inhomogeneous elemental distribution over the cross section and the irregular shape and/or the differing mass density of a hair are also calculated. It is concluded that the accuracy and precision of the PIXE method does not become considerably lower when it is applied to single hair strands, and accuracy and precision below 10% may be reached by implementing the procedure described. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
multielemental analysis, PIXE, hair strands
in
Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
volume
12
issue
2
pages
248 - 256
publisher
Elsevier
external identifiers
  • scopus:0022128470
ISSN
0168-583X
DOI
10.1016/0168-583X(85)90059-X
language
English
LU publication?
yes
id
7502198c-ca2f-4865-9e46-944eaf281004 (old id 1745109)
date added to LUP
2011-01-13 14:45:21
date last changed
2017-01-01 06:52:14
@article{7502198c-ca2f-4865-9e46-944eaf281004,
  abstract     = {The PIXE technique offers the possibility of scanning a single hair strand longitudinally with a millimetre proton beam for trace elements. However, the accuracy of the method has been questioned since the quantification of the mass concentration has been a serious problem. In this paper a specific beam-hair-detector geometry is assumed, and the correction factor accounting for the proton energy loss and the X-ray absorption in a regular hair is calculated. 43 hair segments from 8 individuals, ranging from 45 to 110 μm in in diameter were analyzed giving a mean value of 4.32% (standard deviation 0.25%) for sulphur, and a mean value of 149 ppm (standard deviation 35 ppm) for zinc. It is shown that the correction is important not only for the determination of the absolute elemental concentrations but also for the determination of their relative longitudinal distributions. The secondary corrections accounting for the inhomogeneous elemental distribution over the cross section and the irregular shape and/or the differing mass density of a hair are also calculated. It is concluded that the accuracy and precision of the PIXE method does not become considerably lower when it is applied to single hair strands, and accuracy and precision below 10% may be reached by implementing the procedure described.},
  author       = {Li, Hong-Kou and Akselsson, Roland},
  issn         = {0168-583X},
  keyword      = {multielemental analysis,PIXE,hair strands},
  language     = {eng},
  number       = {2},
  pages        = {248--256},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms},
  title        = {A Quantative Basis for Hair Analysis Using PIXE},
  url          = {http://dx.doi.org/10.1016/0168-583X(85)90059-X},
  volume       = {12},
  year         = {1985},
}