|
Sample
|
a
Beta/gamma
|
b
Uranium mgkg
-1
|
c
U238/U235
|
|---|
|
Soil 1
|
150
|
0.857, 0.685, 1.033
|
129
|
|
Soil 2
|
120
|
0.164, 0.231, 0.252
|
132
|
|
Soil 3
|
160
|
0.688, 0.759, 0.637
|
129
|
|
Soil 4
|
190
|
0.725, 0.603, 0.867
|
130
|
|
Soil 5
|
220
|
0.119, 0.738, 0.907
|
118
|
|
Soil 6
|
130
|
1.44, 1.51, 1.51
|
129
|
|
BP Horizon Oil
| |
0.070, 0.073, 0.073
|
138
|
|
Sediment R. Euphrates
| |
1.05 mgkg-1
|
NA
|
|
Well water
| |
2.72 μgL-1
|
NA
|
|
River water
| |
2.24 μgL-1
|
NA
|
|
Tap water
| |
2.28 μgL-1
|
NA
|
- Three separate aliquots were taken from each soil sample and results are shown. Limit of Detection was 0.002 mgkg-1. As a check on the ion exchange method, the Uranium atom ratio from the deep oil from the BP Horizon Macondo oil spill was run with the Fallujah soil samples.
- a nGyh-1; b mean of three runs is tabulated for each of three aliquots; LOD, U-235 = 0.0007; c Natural ratio is 137.88; these measurements are derived from counts using the ion-exchange extracted Uranium solutions. 95% CI limits for Natural Uranium Ratio are 132.1 < Ratio < 144.1, Values below 132.1 are thus enriched, above 144.1 depleted with p < 0.05. NA = not assessed.
