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

[Bq/kg]
40
30
20
10
0
122 252 5
25 265 174 241 126 185 223 165 14 15 246 82 146 234 279 235 208 83 78 26 52 88 143 95 17 294 215 36 163 176 227 295 77 181 72 30 211 233 124 111 236 267 91 245 255 264 71 80 168 296 40 57 12 41 170 61 125 179 259 73 258 37 16 18 76 257 20 90 209 237 278 289 299 173 11 166 39 114 154 155 193 219 254 261 221 53 268 32 177 217 298 43 22 218 54 44 24 85 220 113 144 84 118
42 210 87 7191 46 136 92 99 172 269 270 60 205 160 178 277 242 356 86 253 183 153 62 134 274 157 300 119 290 130 164 115 192 19 55 132 161 47 127 131 159 190 65 94 123 23 10 251 121 169 194 240 45 275 140 29 112 120 79 110 27 63 6141 70 175 292 293 200 101 13 133 199 31 34 50 93 51 272 216 263 244 288 285 201 284 283 195 260 297 89 151 171 206 152 81 238 142 59 230 273 150 271 109 197 202 225 137
Lab
code
Draft, page 74
Rep.
Value
Performance evaluation of Pb-214 measurement results
Rep.
Unc.
IAEA-447 Moss-soil reference material
Target Value: 26.0 ± 2.0 [Bq/kg]
W
3%
Unc.
[%]
N
22%
A
75%
Pb-214 in moss-soil
Rel.
Bias
Laboratory code
A1 A2 True P Prec
Final
Score
1 22.87 2.4 10.49 -12.04 3.1 8.1 A 13.0 A A
3 24 4 16.67 -7.69 2.0 11.5 A 18.4 A A
5 23 2 8.70 -11.54 3.0 7.3 A 11.6 A A
6 26.8 1.5 5.60 3.08 0.8 6.5 A 9.5 A A
7 23.12 0.8 3.46 -11.08 2.9 5.6 A 8.4 A A
10 25.72 0.75 2.92 -1.08 0.3 5.5 A 8.2 A A
11 21.9 2.4 10.96 -15.77 4.1 8.1 A 13.4 A A
12 21 2 9.52 -19.23 5.0 7.3 A 12.2 A A
13 27.61 2.03 7.35 6.19 1.6 7.4 A 10.6 A A
74