Skip to main content
. Author manuscript; available in PMC: 2019 Apr 11.
Published in final edited form as: J Radioanal Nucl Chem. 2018;318:10.1007/s10967-018-6032-9. doi: 10.1007/s10967-018-6032-9

Table 1.

229Th RM and SRM 4328C LS source preparation details and characteristics

LS source
series		 Mass of scintillant
(g)		 Mass of 229Th solution aliquot
(g)		 Mass of blank HNO3
(g)		 Total mass cocktail
(g)		 faq (%) H#
229Th RM
 UGAB		 9.850 (3) 0.2039 (9) 0.798 (23) 10.912 (19)  9.18 (19)  89.0 (3)
4328Cs UGAB 9.852 (1) 0.9909 (10) – 10.906 (11)  9.09 (8)  91.2 (5)
229Th RM
 ECOS		 8.916 (17) 0.1993 (40) 0.790 (26)  9.969 (42)  9.92 (2) 118.4 (3)
4328Cs ECOS 8.910 (7) 1.0103 (26) –  9.987 (8) 10.12 (2) 121.1 (3)

Each LS Source Series consisted of 3 separately prepared counting sources. UGAB and ECOS refer to the Ultima Gold AB and Ecoscint scintillation solutions, respectively. The values for the masses (g) and aqueous mass fraction faq (in %) are averages for the three sources in the series with the values in parentheses representing the standard deviation of the means. H# is the average quench indicating parameter (as measured in Counter B) which is an additional indicator of the close composition matching between the two 229Th solutions for each scintillant cocktail