Worldwide Open Proficiency Test: Determination of ... - Nucleus - IAEA

[Bq/kg]
60
50
40
30
20
10
0
25 223 246 15 114 245 296 165 177 270 255 126 190 43 52 260 31 295 259 46 7191
86 138 292 293 258 32 71 219 237 263 144 110 72 61 118 278 294 76 235 44 284 123 175 164 218 654 244 201 60 215 39 132 209 221 19 168 269 26 89 92 22 91 200 210 273 90 169 289 227 77 178 57 220 17 130 159 179 124 217 36 53 112 120 140 154 29 185 257 300 10 238 241 297 298 542 45 81 170 192 181 101 157 37 134 285 206 211 161 275 64 199 277 82 65 242 12 50 133 172 194 253 254 11 122 13 55 21 63
174 84 85 99 252 256 239 27 62 212 232 236 125 288 41 70 87 195 113 20 160 83 131 216 16 30 111 251 264 79 59 234 356 88 208 261 267 23 265 127 153 18 24 176 146 40 173 58 95 183 279 155 233 141 299 93 34 205 274 171 193 47 290 115 136 119 51 207 272 166 73 142 268 80 78 163 14 283 143 94 100 121 151 152 150 109 182 271 225 197 202 74
Lab
code
Rep.
Value
Performance evaluation of Ac-228 measurement results
Rep.
Unc.
IAEA-447 Moss-soil reference material
Target Value: 37.0 ± 2.0 [Bq/kg]
Unc.
[%]
W
1%
N
10%
A
89%
Ac-228 in moss-soil
Rel.
Bias
Laboratory code
A1 A2 True. P Prec.
1 37.47 3.56 9.50 1.27 0.5 10.5 A 10.9 A A
3 39 5 12.82 5.41 2.0 13.9 A 13.9 A A
5 36 2 5.56 -2.70 1.0 7.3 A 7.8 A A
6 33.6 2.1 6.25 -9.19 3.4 7.5 A 8.3 A A
7 31.56 0.73 2.31 -14.70 5.4 5.5 A 5.9 A A
10 35.87 0.92 2.56 -3.05 1.1 5.7 A 6.0 A A
11 37.1 3.9 10.51 0.27 0.1 11.3 A 11.8 A A
12 37 3 8.11 0.00 0.0 9.3 A 9.7 A A
13 37.15 2.24 6.03 0.41 0.1 7.7 A 8.1 A A
14 46.7 5.87 12.57 26.22 9.7 16.0 A 13.7 A A
15 27.23 2.93 10.76 -26.41 9.8 9.2 N 12.0 A N
Final
Score