Sample code 232Th 238U 40K
GW1 0.656 ± 0.12 10.103 ± 0.73 2.28 ± 0.17
GW2 0.525 ± 0.08 14.004 ± 0.52 1.156 ± 0.33
GW3 0.683 ± 0.11 13.424± 1.02 0.868 ± 0.41
GW4 0.316 ± 0.02 8.214 ± 1.14 1.050 ± 0.06
Table 3: Activity concentrations of 232Th, 238U and 40K (Bq/L) in the studied samples.