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Determination of trace boron in steels by prompt gamma-ray activation analysis
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2009, v.22 no.4, pp.302-306
(National Institute of Standards and Tdchnology)
&
R.,
L.
P.
(2009). Determination of trace boron in steels by prompt gamma-ray activation analysis. Analytical Science and Technology, 22(4), 302-306.
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Abstract
A trace amount of boron in steel significantly influences its mechanical and physical properties. A prompt gamma ray activation analysis (PGAA) method is used to measure boron in low alloy steel samples of KRISS 101-01-C21~C26. NIST SRMs of 362, 364, 1761 and 1767 serve as the control standards to validate the measurement method. The measured values of the NIST SRMs are consistent with their certified values within the expected uncertainties, except for that of NIST SRM 362. Experimental uncertainties are evaluated according to the guidelines given by the International Organization for Standardization (ISO). The expanded uncertainties are calculated with a coverage factor of 2, at approximately 95% confidence level. The calculated relative expanded uncertainties of boron mass fractions are between 3% and 7% at the mg/kg level. The results are compared with the results measured by the solvent extraction-inductively coupled optical emission spectrometry (ICP/OES) method.
- keywords
- Prompt gamma-ray activation analysis, boron, low alloy steel, certified reference material, uncertainty
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