%A Mei Woo, Yii
%A Mahmud, Maziah
%A Wan Mahmood, Zal U'yun
%D 2019
%T COMPARISON OF AUTO VERSUS MANUAL CALCULATION OF K-40 ACTIVITY CONCENTRATION IN POWDERED MILK MEASURED USING GAMMA SPECTROMETRY SYSTEM
%K
%X Gamma spectrometry counting system nowadays equipped with commercial analysis software to calculate the radionuclide activity automatically but manual calculation still a common practice in some laboratories. This paper reported and compared the activity concentration of 40 K in 120 powdered milk samples that had been quantified and calculated using both automatic and manual approaches. From software calculation, 40 K radioactivity found varies from 212 Bq/kg to 508 Bq/kg with the average of 294 ± 73 Bq/kg and the activity uncertainty associated with samples ranged of 1.9% to 2.8%. Meanwhile, from the manual calculation, 40 K radioactivity varies from 206 Bq/kg to 501 Bq/kg with the average of 285 ± 73 Bq/kg and the uncertainty of manual calculations were between 6.8% to 7.0%. Almost all results (except two samples) showed that the auto calculation had activity higher than that obtained from the manual calculation. Overall all samples activities had a difference of less than 9 percent between the auto and manual calculation. However, U-score calculation showing none of the difference between the auto and manual value was significant.
%U https://jsnm.nuclearmalaysia.gov.my/index.php/jsnm/article/view/149
%J Jurnal Sains Nuklear Malaysia
%0 Journal Article
%P 7-13%V 31
%N 2
%@ 2232-0946
%8 2019-06-17