. Author manuscript; available in PMC: 2018 Oct 1.

Published in final edited form as: J Radioanal Nucl Chem. 2017 Jul 26;314(1):513–519. doi: 10.1007/s10967-017-5342-7

Table 3.

Comparison of counting uncertainties for selenium results @ 264 keV in KRISS infant formula, NIST SRM 1849 control material and candidate SRM 1869 for 8 h counting of each sample in standard INAA assay and in the two detector array

Sample	INAA count			Two-detector γγ coincidence	Two-detector sum
Sample	Mass fraction (mg/kg)	U (mg/kg)	U_count (%)	U_count (%)	U_count (%)
KRISS-A1	0.098	0.017	17.6	15.8	7.4
KRISS-A2	0.074	0.016	21.7	17.8	7.1
KRISS-A3	0.092	0.016	17.5	18.1	8.6
KRISS-B4	0.101	0.018	18.1	16.8	8.5
KRISS-B5	0.070	0.018	26.0	13.5	6.2
KRISS-B6	0.101	0.018	17.6	12.2	5.4
Average	0.089^*	0.014
SRM 1849	0.824^*	0.026	3.2	1.9	0.6
SRM 1869	0.742	0.025	3.3	3.7	1.3

Comparable values: KRISS: 0.0905 ± 0.0029; COA SRM 1849: 0.812 ± 0.029