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

[Bq/kg]
40
30
20
10
0
265 267 241 110 174 185 111 80 165 190 215 223 126 142 259 72 77 278 246 82 83 176 279 183 236 27 294 177 208 124 154 264 95 153 26 30 41 193 37 132 91 113 14 54 166 84 61 90 295 299 141 168 221 237 257 211 17 42 52 62 88 170 192 194 240 261 173 46 85 43 181 36 71 140
255 268 16 209 32 242 15 125 131 277 234 227 217 245 253 191 258 11 20 29 73 18 122 296 164 233 220 44 76 118 178 112 120 53 298 57 219 273 12 24 56 86 134 155 289 136 123 252 161 22 78 205 146 7127 539 92 254 274 47 163 175 13 94 179 99 144 169 79 218 263 160 55 172 370 130 6159 143 87 140 157 216 51 290 65 200 300 10 93 275 31 115 270 269 251 63 60 288 19 23 45 133 272 199 284 101 119 244 260 292 293 206 50 285 152 201 151 89 34 297 59 195 210 238 171 81 283 235 230 121 150 109 182 197 271 202 225 137
Lab
code
Draft, page 80
Rep.
Value
Performance evaluation of Bi-214 measurement results
Rep.
Unc.
IAEA-447 Moss-soil reference material
Target Value: 24.8 ± 2.0 [Bq/kg]
W
4%
Unc.
[%]
N
22%
A
74%
Bi-214 in moss-soil
Rel.
Bias
Laboratory code
A1 A2 True P Prec
Final
Score
1 20.37 2.01 9.87 -17.86 4.4 7.3 A 12.7 A A
3 24 4 16.67 -3.23 0.8 11.5 A 18.5 A A
5 23 2 8.70 -7.26 1.8 7.3 A 11.9 A A
6 24.2 1.5 6.20 -2.42 0.6 6.5 A 10.2 A A
7 22.66 0.75 3.31 -8.63 2.1 5.5 A 8.7 A A
10 25.39 0.82 3.23 2.38 0.6 5.6 A 8.7 A A
11 21.1 2.9 13.74 -14.92 3.7 9.1 A 15.9 A A
12 22 1 4.55 -11.29 2.8 5.8 A 9.3 A A
13 23.39 2.05 8.76 -5.69 1.4 7.4 A 11.9 A A
74