Comparison of relative INAA and k 0-INAA using soil and sediment reference materials
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The objective of this work was to compare the results obtained by the relative INAA and k 0-INAA methods for the same input parameters (sample mass, nuclear data, net peak area for the same gamma line and the same measurement and same cooling and measurement times). In total eight environmental soil and sediment reference materials (RM) or certified reference materials (CRM) from different producers were analysed. In this work only the recommended or certified values were considered, allowing comparison of the two methods for 30 elements. The results point out that k 0-INAA possesses superior qualities compared to relative INAA, being insensitive to flux gradients, and independent of recommended/certified values in RMs/CRMs, often used as standards in relative INAA.
KeywordsINAA k0-INAA Soil Sediment Reference material Certified reference material
The author is grateful for financial support from the Slovenian Research Agency (ARRS) through programme P1-0143 and the Metrology Institute of the Republic of Slovenia (MIRS) under MIRS/IJS contract No. 6401-5/2009/27 for activities and obligations performed as a Designate Institute as an etalon (standard of measurement) for amount of substance in soil.
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