Hostname: page-component-89b8bd64d-7zcd7 Total loading time: 0 Render date: 2026-05-08T13:40:31.921Z Has data issue: false hasContentIssue false

Parameter studies for an optimized XRF-determination of Pb in bone

Published online by Cambridge University Press:  01 March 2012

N. Cernohlawek
Affiliation:
Atominstitut, TU-Wien, Stadionallee 2, A-1020 Vienna, Austria
P. Wobrauschek
Affiliation:
Atominstitut, TU-Wien, Stadionallee 2, A-1020 Vienna, Austria
C. Streli
Affiliation:
Atominstitut, TU-Wien, Stadionallee 2, A-1020 Vienna, Austria
N. Zoeger
Affiliation:
Atominstitut, TU-Wien, Stadionallee 2, A-1020 Vienna, Austria
Get access

Abstract

One of the main threats to human health from heavy metals is associated with the exposure to lead (Pb). In vivo X-ray fluorescence analysis (XRF) of human bone is a widely used technique to determine the total Pb body burden. The intention of this work was to study the feasibility of in vivo L-shell XRF measurements of Pb in bone using X-ray tubes as excitation sources. Parameter studies using direct tube excitation with various anode materials (Mo and W) and filters as well as different secondary targets and low-Z polarizers were performed with regard to the lowest limits of detection (LLD) achievable for Pb in bone matrix. A breakthrough for the development of a portable spectrometer was achieved by using an air-cooled low-power (50 W) Pd anode X-ray tube, Mo secondary target, and a Peltier-cooled silicon drift detector. LLDs for Pb in bone were determined from measurements on a plaster-of-paris standard without overlying tissue equivalent material and found to be around 0.6 μg∕g.

Information

Type
X-Ray Fluorescence and Related Techniques
Copyright
Copyright © Cambridge University Press 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable