Internal Cross-Checking Self-Verification in NAA

Use of the four strategies (i)-(4) (and different isotopic routes) provides assurance that the errors to which NAA is liable, like aU analytical techniques, will be reduced or at least altered in the alternative route. The more elements of independence are combined, the less the likelihood of repeating the same error. 

Of the four strategies given above, the best condition for obtaining independent data for quality control (QC) are satisfied when INAA and RNAA results are compared, because the use of RNAA dramatically improves the selectivity of signal measurement and eliminates or greafiy reduces the measurement uncertainty sotuces, such as spectral interferences. A variety of radiochemical separations and 

Element (unit) Nuclear Reaction NAA mode This u/ork NIST value 

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