Table 3.

Types and contents of nuclides in PG determined by various countries, regions and organisations.

Reference	Countries, regions and organisations	238U	235U	210Pb	214Pb	226Ra	228Ra	232Th	234Th	40K
(Shen et al., 2019)	China	28.00 ± 13.00	2.70 ± 0.10	86.00 ± 4.80	-	61.00 ± 2.10	-	2.30 ± 0.50	-	3.30 ± 6.00
(Luca et al., 2009)	IAEA	-	2.86 ± 0.46	150.00 ± 19.00	72.00 ± 10.00	100.00 ± 13.00	-	-	47.00 ± 7.00	-
(Papastefanou et al., 2006)	Greece	19.00 ± 7.00	-	430.00 ± 7.00	-	585.00 ± 2.00	3.30 ± 0.10	3.30 ± 0.10	-	13.00 ± 1.00
(Msila et al., 2016)	South Africa	31.00 ± 20.00	1.00 ± 1.00	135.00 ± 37.00	-	109.00 ± 18.00	404.00 ± 70.00	189.00 ± 155.00	-	<100.00
(da Conceicao and Bonotto, 2006)	Brazil	298.00–310.00	298.00–310.00	-	-	269.00–280.00	-	185.00–206.00	-	60.00–63.00
(Renteria-Villalobos et al., 2010)	Morocco	100.00 ± 22.00	-	827.00 ± 46.00	-	785.00 ± 42.00	-	-	-	-
(Rutherford et al., 1995)	United States	4.50	-	340.00–440.00	-	470.00–680.00	-	-	-	-
(Kuzmanovic et al., 2020)	Serbia	-	-	-	-	656.00 ± 4.00	-	3.10 ± 0.90	-	101.00 ± 6.00
(Gezer et al., 2012)	Turkey	-	-	-	-	436.00		9.00	-	13.00
(Alam et al., 1997)	Bangladesh	-	-	-	-	234.00	-	21.00	-	108.00
(Mourad et al., 2009)	Egypt	-	-	-	-	596.00	-	6.00	-	2.00
(Al-Jundi et al., 2008)	Jordan	-	-	-	-	376.00	-	4.00		40.00
(Song et al., 2011)	Korea	-	-	-	-	618.00	-	8.50	-	24.10
(Kovler et al., 2002)	Israel	-	-	-	-	747.00	-	14.00	-	63.00
(Duenas et al., 2010)	Spain	-	-	-	-	740.00 ± 60	-	<8.00	-	50.00 ± 6.00
(El Zrelli et al., 2018)	Tunisia	1.60 ± 0.16	-	-	-	-	-	0.74 ± 0.70	-	-
(Diwa et al., 2022)	Philippine	655.80	-	-	-	-	-	14.50	-	84.80