| Experiment 6918 (2018) | Expt. 6717 (2017) | ||||
Isotope used | First blank CPS | First blank ng・g−1 | Last wash CPS | Last wash-first blank Apparent conc. increase ng・g−1 | Equivalent % increase vs BCR1 | % “Contamination” increase in Std solution blanks compared to element conc. in BCR1 |
7Li | 39 | 0.3145 | 14 | −0.203 | −1.464 | 0.5 |
9Be | 0 | 0.0012 | 2 | 0.009 | 0.661 | 0.01 |
11B | 186 | 2.2120 | 219 | 0.391 | 5.597 | 5 |
45Sc | 28 | 0.0054 | 120 | 0.018 | 0.047 | − |
51V | 583 | 0.0424 | 1038 | 0.033 | 0.006 | 0.5 |
53Cr | 284 | 0.1340 | 358 | 0.035 | 0.276 | 3 |
59Co | 2215 | 0.0743 | 787 | −0.048 | −0.112 | 0.1 |
60Ni | 1792 | 0.2299 | 1376 | −0.053 | −0.487 | − |
63Cu | 4660 | 0.2152 | 5439 | 0.036 | 0.207 | 0.6 |
66Zn | 1790 | 0.4508 | 2073 | 0.071 | 0.044 | − |
85Rb | 210 | 0.0236 | 620 | 0.046 | 0.083 | 0.3 |
88Sr | 287 | 0.0240 | 1291 | 0.084 | 0.019 | 0.01 |
89Y | 1491 | 0.0473 | 473 | −0.032 | −0.093 | 0.01 |
90Zr | 1287 | 0.0602 | 3563 | 0.106 | 0.041 | 0.05 |
93Nb | 2465 | 0.0552 | 6900 | 0.099 | 0.667 | 1 to 5 |
133Cs | 301 | 0.0116 | 567 | 0.010 | 0.906 | 1 |
137Ba | 1237 | 0.1305 | 2697 | 0.154 | 0.034 | 0.02 |
139La | 2582 | 0.0365 | 2720 | 0.002 | 0.007 | 0.03 |
140Ce | 38054 | 0.4407 | 26967 | −0.128 | −0.210 | 0.03 |
141Pr | 424 | 0.0049 | 839 | 0.005 | 0.070 | 0.03 |
146Nd | 228 | 0.0154 | 317 | 0.006 | 0.019 | 0.02 |
147Sm | 19 | 0.0016 | 93 | 0.006 | 0.077 | 0.01 |
153Eu | 45 | 0.0008 | 334 | 0.005 | 0.253 | 0.004 |
157Gd | 204 | 0.0076 | 321 | 0.004 | 0.052 | 0.03 |
159Tb | 48 | 0.0003 | 760 | 0.005 | 0.500 | 0.001 |
163Dy | 14 | 0.0004 | 211 | 0.006 | 0.095 | 0.05 |
165Ho | 49 | 0.0003 | 781 | 0.005 | 0.424 | 0.005 |
166Er | 16 | 0.0003 | 262 | 0.005 | 0.146 | 0.05 |
169Tm | 68 | 0.0004 | 930 | 0.005 | 1.130 | 0.005 |
172Yb | 15 | 0.0004 | 208 | 0.006 | 0.171 | 0.03 |
175Lu | 24 | 0.0002 | 498 | 0.005 | 0.982 | 0.05 |
178Hf | 551 | 0.0141 | 2000 | 0.037 | 0.706 | 0.02 |
181Ta | 3250 | 0.0162 | 3391 | 0.001 | 0.095 | 0.1 |
208Pb | 6873 | 0.1002 | 8335 | 0.021 | 0.142 | − |
232Th | 2052 | 0.0167 | 3695 | 0.013 | 0.239 | 0.5 |
238U | 2069 | 0.0131 | 3248 | 0.007 | 0.569 | 0.5 |