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http://dx.doi.org/10.5806/AST.2009.22.4.302

Determination of trace boron in steels by prompt gamma-ray activation analysis  

Kim, I.J. (Korea Research Institute of Standards and Science)
Cho, K.H. (Korea Research Institute of Standards and Science)
Paul, R.L. (National Institute of Standards and Technology)
Publication Information
Analytical Science and Technology / v.22, no.4, 2009 , pp. 302-306 More about this Journal
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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