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[en] Beside to complished the requirements of international standard of ISO/IEC 17025:2005, uncertainty estimation should be done to increase quality and confidence of analysis results and also to establish traceability of the analysis results to SI unit. Neutron activation analysis is a major technique used by Radiometry technique analysis laboratory and is included as scope of accreditation under ISO/IEC 17025:2005, therefore uncertainty estimation of neutron activation analysis is needed to be carried out. Sample and standard preparation as well as, irradiation and measurement using gamma spectrometry were the main activities which could give contribution to uncertainty. The components of uncertainty sources were specifically explained. The result of expanded uncertainty was 4,0 mg/kg with level of confidence 95% (coverage factor=2) and Zn concentration was 25,1 mg/kg. Counting statistic of cuplikan and standard were the major contribution of combined uncertainty. The uncertainty estimation was expected to increase the quality of the analysis results and could be applied further to other kind of samples. (author)
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Duyeh Setiawan; Rochestri Sofyan; Nurlaila Z; Poppy Intan Tjahaja; Efrizon Umar; Muhayatun; Nanny K Oekar; Sudjatmi K Alfa; Dani Gustaman Syarif; Didi Gayani; Djoko Hadi P; Saeful Hidayat (National Nuclear Energy Agency, Bandung (Indonesia)); Ari Darmawan Pasek; Nathanel P Tandian; Toto Hardianto (Bandung Institute of Technology, Bandung (Indonesia)) (eds.); Centre for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency (Indonesia); 386 p; ISSN 1858-3601; 
; Nov 2009; p. 334-341; National Seminar in Nuclear Science Technology; Seminar Nasional Sains dan Teknologi Nuklir; Bandung (Indonesia); 3 Jun 2009; Also available from Center for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency, Jl. Tamansari 71, Telp. 62-22-2503997 Fax. 62-22-2504081, Bandung 40132 (ID); 10 refs.; 3 tabs.; 2 figs.
; Nov 2009; p. 334-341; National Seminar in Nuclear Science Technology; Seminar Nasional Sains dan Teknologi Nuklir; Bandung (Indonesia); 3 Jun 2009; Also available from Center for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency, Jl. Tamansari 71, Telp. 62-22-2503997 Fax. 62-22-2504081, Bandung 40132 (ID); 10 refs.; 3 tabs.; 2 figs.