Quality control and performance evaluation of k0-based neutron activation analysis at the Portuguese research reactor

被引:32
作者
Dung, H. M. [1 ]
Freitas, M. C. [1 ]
Blaauw, M. [2 ]
Almeida, S. M. [1 ]
Dionisio, I. [1 ]
Canha, N. H. [1 ]
机构
[1] Inst Technol & Nucl, P-2686953 Sacavem, Portugal
[2] Delft Univ Technol, Reactor Inst Delft, NL-2629 JB Delft, Netherlands
关键词
Quality control; k(0)-based NAA; Reference materials; SMELS; K(0); NAA;
D O I
10.1016/j.nima.2010.04.003
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The quality control (QC) and performance evaluation for the k(0)-based neutron activation analysis (k(0)-NAA) at the Portuguese research reactor (RPI) has been developed with the intention of using the method to meet the demands of trace element analysis for the applications in environmental, epidemiological and nutritional studies amongst others. The QC and performance evaluation include the following aspects: (1) estimation of the overall/combined standard uncertainty from the primary uncertainty sources; (2) validation of the method using a synthetic multi-element standard (SMELS); and (3) analysis of the certified reference materials from the National Institute of Standards and Technology (USA): NIST-SRM-1633a and NIST-SRM-1648 and the reference material from the International Atomic Energy Agency: IAEA-RM-336, for the purpose of controlling the overall accuracy and precision of the analytical results. The obtained results revealed that the k(0)-NAA method established at the RPI was fit for the purpose. The overall/ combined standard uncertainty was estimated for elements of interest in the intended applications. The laboratory's analytical results as compared to the assigned values with the bias were less than 12% for most elements, except for a few elements which biased within 13-18%. The u-score values for most elements were less than vertical bar 1.64 vertical bar, except for Co, La and Ti within vertical bar 1.64 vertical bar-vertical bar 1.96 vertical bar and Sc, Cr, K and Sb within vertical bar 1.96 vertical bar-vertical bar 2.58 vertical bar. The NIST-1633a was also analyzed over 14, months for the purpose of evaluating the reproducibility of the method. The quality factors of k(0)-NAA established at RPI were evaluated, proving that the method meets the requirements of trace element analysis, which is also considering the method's performance for which the k(0)-NAA affords a specific, rapid and convenient capability for the intended applications. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:392 / 398
页数:7
相关论文
共 13 条
[1]  
[Anonymous], 1979, FUNDAMENTALS MATH ST
[2]  
[Anonymous], 2005, ISOIEC170252005
[3]  
[Anonymous], 2008, JCGM
[4]  
[Anonymous], 1995, GUID EXPR UNC MEAS
[5]   THE HOLISTIC ANALYSIS OF GAMMA-RAY SPECTRA IN INSTRUMENTAL NEUTRON-ACTIVATION ANALYSIS [J].
BLAAUW, M .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1994, 353 (1-3) :269-271
[6]  
BLAAUW M, 2009, K0 IAEA PROGRAM MANU
[7]   Recommended nuclear data for use in the k0 standardization of neutron activation analysis [J].
De Corte, F ;
Simonits, AS .
ATOMIC DATA AND NUCLEAR DATA TABLES, 2003, 85 (01) :47-67
[8]  
De Corte F, 1987, THESIS U GENT
[9]   Calibration of gamma-ray spectrometers coupled to Compton suppression and fast pneumatic systems for the k0-standardized NAA method [J].
Dung, H. M. ;
Freitas, M. C. ;
Sarmento, S. ;
Blaauw, M. ;
Beasley, D. .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2008, 278 (03) :621-625
[10]   Compilation of k0 and related data for neutron-activation analysis (NAA) in the form of an electronic database -: (IUPAC technical report) [J].
Kolotov, VP ;
De Corte, F .
PURE AND APPLIED CHEMISTRY, 2004, 76 (10) :1921-1925