Online-only Table 2.
Comparison of analytical performances of LA-ICP-MS systems.
| Standard | Laboratory | Beam Diameter (µm) | Ca (µg/g) | Rb (µg/g) | Sr (µg/g) | Y (µg/g) | Zr (µg/g) | Nb (µg/g) | Ba (µg/g) | La (µg/g) | Ce (µg/g) | Pr (µg/g) | Nd (µg/g) | Sm (µg/g) | Eu (µg/g) | Gd (µg/g) | Tb (µg/g) | Dy (µg/g) | Ho (µg/g) | Er (µg/g) | Tm (µg/g) | Yb (µg/g) | Lu (µg/g) | Hf (µg/g) | Ta (µg/g) | Pb (µg/g) | Th (µg/g) | U (µg/g) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comparison 15 µm and 20 µm spotsizes UoB | |||||||||||||||||||||||||||||
| ATHO-G | Jochum et al., 2006 | preferred value | 12150 | 65.3 | 94.1 | 94.5 | 512 | 62.4 | 547 | 55.6 | 121 | 14.6 | 60.9 | 14.2 | 2.76 | 15.3 | 2.51 | 16.2 | 3.43 | 10.3 | 1.52 | 10.5 | 1.54 | 13.7 | 3.9 | 5.67 | 7.4 | 2.37 | |
| ATHO-G | Jochum et al., 2006 | preferred value uncertainty | 214 | 3 | 2.7 | 3.5 | 20 | 2.6 | 16 | 1.5 | 4 | 0.4 | 2 | 0.4 | 0.1 | 0.7 | 0.08 | 0.7 | 0.11 | 0.5 | 0.07 | 0.4 | 0.05 | 0.5 | 0.2 | 0.62 | 0.27 | 0.12 | |
| ATHO-G | UoB | 20 | mean (n = 13) | 12118 | 62.8 | 93.2 | 87.9 | 477 | 54.8 | 532 | 53.3 | 117 | 14.4 | 57.4 | 14.1 | 2.8 | 14.7 | 2.4 | 15.5 | 3.4 | 9.9 | 1.5 | 10.0 | 1.5 | 13.3 | 3.4 | 5.2 | 7.2 | 2.2 |
| ATHO-G | UoB | 20 | standard deviation | 363 | 0.8 | 1.6 | 1.6 | 21 | 2.7 | 8 | 1.0 | 3 | 0.2 | 2.6 | 0.9 | 0.3 | 0.7 | 0.1 | 0.5 | 0.2 | 0.7 | 0.1 | 0.5 | 0.1 | 0.5 | 0.1 | 0.3 | 0.3 | 0.1 |
| ATHO-G | UoB | 20 | bias mean to preferred value% | -0.3% | -3.8% | -1.0% | -7.0% | -6.9% | -12.1% | -3% | -4.1% | -3% | -1.7% | -5.7% | -0.7% | 1.0% | -4.2% | -4.1% | -4.1% | -2.0% | -4.4% | -2.6% | -5.0% | -4.3% | -3.0% | -11.8% | -8.3% | -2.8% | -8.3% |
| ATHO-G | UoB | 20 | relative std. deviation | 3.0% | 1.2% | 1.8% | 1.8% | 4.3% | 4.9% | 1% | 1.8% | 2% | 1.6% | 4.6% | 6.2% | 12.1% | 5.0% | 5.3% | 3.2% | 5.6% | 7.5% | 7.1% | 5.0% | 6.5% | 3.7% | 3.9% | 4.9% | 4.2% | 4.9% |
| ATHO-G | UoB | 15 | mean (n = 24) | 12578 | 63.3 | 90.8 | 85.7 | 463 | 55.4 | 522 | 52.0 | 116 | 13.8 | 57.5 | 13.3 | 2.5 | 14.8 | 2.3 | 15.2 | 3.3 | 9.7 | 1.5 | 10.1 | 1.5 | 12.5 | 3.3 | 5.1 | 6.9 | 2.2 |
| ATHO-G | UoB | 15 | standard deviation | 2047 | 3.4 | 2.8 | 3.6 | 23 | 1.9 | 22 | 1.9 | 3 | 0.6 | 3.9 | 1.5 | 0.3 | 2.7 | 0.3 | 1.9 | 0.4 | 1.8 | 0.2 | 1.2 | 0.2 | 2.2 | 0.3 | 0.6 | 0.4 | 0.2 |
| ATHO-G | UoB | 15 | bias mean to preferred value% | 3.5% | -3.1% | -3.5% | -9.3% | -10% | -11.1% | -5% | -6.4% | -4% | -5.7% | -5.6% | -6.1% | -8.1% | -3.1% | -6.9% | -6.0% | -5.1% | -6.1% | -1.8% | -4.1% | -5.1% | -8.7% | -14.7% | -10.0% | -6.5% | -6.2% |
| ATHO-G | UoB | 15 | relative std. deviation | 16.3% | 5.4% | 3.1% | 4.1% | 5% | 3.5% | 4% | 3.6% | 3% | 4.7% | 6.7% | 11.4% | 11.4% | 18.4% | 11.5% | 12.4% | 10.8% | 18.1% | 15.1% | 12.3% | 13.4% | 17.4% | 8.9% | 12.0% | 5.3% | 10.3% |
| ATHO-G | bias% mean 20 to 15 µm | -3.7% | -0.8% | 2.6% | 2.6% | 2.9% | -1.1% | 2.0% | 2.5% | 1.2% | 4.3% | -0.1% | 5.9% | 9.8% | -1.2% | 3.0% | 2.1% | 3.3% | 1.9% | -0.7% | -1.0% | 0.9% | 6.3% | 3.3% | 1.9% | 4.0% | -2.2% | ||
| NIST610 | Jochum et al., 2011 | preferred value | 81475 | 425.7 | 515.5 | 462 | 448 | 465 | 452 | 440 | 453 | 448 | 430 | 453 | 447 | 449 | 437 | 437 | 449 | 455 | 435 | 450 | 439 | 435 | 446 | 426 | 457.2 | 461.5 | |
| NIST610 | Jochum et al., 2011 | preferred value uncertainty | 1429 | 1 | 1 | 11 | 9 | 34 | 9 | 10 | 8 | 7 | 8 | 11 | 12 | 12 | 9 | 11 | 12 | 14 | 10 | 9 | 8 | 12 | 33 | 1 | 1 | 1 | |
| NIST610 | UoB | 20 | mean (n = 38) | 83769 | 436.7 | 524.3 | 472 | 457 | 480 | 463 | 455 | 468 | 467 | 443 | 470 | 461 | 458 | 458 | 448 | 464 | 465 | 444 | 471 | 458 | 445 | 465 | 435 | 474.0 | 476.7 |
| NIST610 | UoB | 20 | standard deviation | 3685 | 25.9 | 36.4 | 33 | 36 | 33 | 32 | 36 | 34 | 39 | 42 | 37 | 33 | 39 | 34 | 46 | 39 | 40 | 32 | 35 | 39 | 45 | 40 | 41 | 41.8 | 37.2 |
| NIST610 | UoB | 20 | bias mean to preferred value% | 2.8% | 2.6% | 1.7% | 2.2% | 2.1% | 3.3% | 2.5% | 3.5% | 3.3% | 4.3% | 3.0% | 3.7% | 3.2% | 2.0% | 4.8% | 2.5% | 3.3% | 2.3% | 2.2% | 4.7% | 4.3% | 2.4% | 4.3% | 2.1% | 3.7% | 3.3% |
| NIST610 | UoB | 20 | relative std. deviation | 4.4% | 5.9% | 6.9% | 7.0% | 7.8% | 6.9% | 6.8% | 8.0% | 7.3% | 8.4% | 9.4% | 7.9% | 7.2% | 8.5% | 7.5% | 10.3% | 8.3% | 8.6% | 7.1% | 7.5% | 8.6% | 10.2% | 8.7% | 9.3% | 8.8% | 7.8% |
| NIST610 | UoB | 15 | mean (n = 31) | 81850 | 433.0 | 514.7 | 460 | 444 | 478 | 455 | 441 | 460 | 450 | 434 | 447 | 453 | 440 | 442 | 436 | 449 | 441 | 434 | 463 | 435 | 457 | 452 | 422 | 459.6 | 463.7 |
| NIST610 | UoB | 15 | standard deviation | 3348 | 22.5 | 13.7 | 12 | 23 | 14 | 20 | 9 | 14 | 15 | 16 | 17 | 22 | 19 | 14 | 15 | 14 | 31 | 12 | 27 | 14 | 88 | 13 | 15 | 12.9 | 14.2 |
| NIST610 | UoB | 15 | bias mean to preferred value% | 0.5% | 1.7% | -0.1% | -0.4% | -1% | 3% | 1% | 0.1% | 2% | 0.4% | 1% | -1% | 1% | -2% | 1% | -0.1% | 0.1% | -3% | -0.2% | 3% | -1% | 5% | 1% | -1% | 0.5% | 0.5% |
| NIST610 | UoB | 15 | relative std. deviation | 4.1% | 5.2% | 2.7% | 2.6% | 5.1% | 3.0% | 4.3% | 2.1% | 3.0% | 3.2% | 3.7% | 3.8% | 4.8% | 4.3% | 3.2% | 3.5% | 3.1% | 7.1% | 2.9% | 5.7% | 3.3% | 19.3% | 2.9% | 3.6% | 2.8% | 3.1% |
| NIST610 | UoB | bias% mean 20 to 15 µm | 2.3% | 0.9% | 1.8% | 2.7% | 3.0% | 0.3% | 1.7% | 3.3% | 1.6% | 3.9% | 2.0% | 5.0% | 1.8% | 4.0% | 3.6% | 2.6% | 3.3% | 5.6% | 2.4% | 1.7% | 5.3% | -2.6% | 2.8% | 3.1% | 3.1% | 2.8% | |
| Comparison University of Bonn // iCRAG Trinity College Dublin | |||||||||||||||||||||||||||||
| StHs6_80-G | Jochum et al., 2006 | preferred value | 37736 | 30.7 | 482 | 11.4 | 118 | 6.94 | 298 | 12.0 | 26.1 | 3.20 | 13.0 | 2.78 | 0.953 | 0.371 | 2.22 | 0.420 | 1.18 | 0.172 | 1.13 | 0.168 | 3.07 | 0.420 | 10.3 | 2.28 | 1.01 | ||
| StHs6_80-G | Jochum et al., 2006 | preferred value uncertainty | 643 | 1.7 | 8 | 0.4 | 3 | 0.25 | 9 | 0.3 | 0.7 | 0.06 | 0.3 | 0.05 | 0.022 | 0.09 | 0.011 | 0.06 | 0.011 | 0.04 | 0.007 | 0.03 | 0.006 | 0.09 | 0.015 | 0.9 | 0.07 | 0.04 | |
| StHs6_80-G | UoB | 20 + 15 | mean (n = 28) | 34529 | 29.1 | 443 | 10.2 | 105 | 5.86 | 274 | 10.8 | 23.3 | 2.88 | 11.6 | 2.59 | 0.770 | 3.00 | 0.384 | 2.12 | 0.398 | 1.29 | 0.164 | 1.01 | 0.177 | 2.61 | 0.374 | 8.2 | 2.05 | 0.86 |
| StHs6_80-G | UoB | 20 + 15 | standard deviation | 3149 | 1.8 | 13.25 | 0.83 | 8.00 | 0.59 | 13.18 | 0.74 | 1.00 | 0.27 | 1.82 | 0.64 | 0.25 | 1.38 | 0.19 | 0.53 | 0.12 | 0.54 | 0.20 | 0.59 | 0.10 | 0.84 | 0.13 | 0.89 | 0.23 | 0.15 |
| StHs6_80-G | UoB | 20 + 15 | bias mean to preferred value% | -8.5% | -5.3% | -8.1% | -10.1% | -11.4% | -15.6% | -8.2% | -10.3% | -10.9% | -10.0% | -10.4% | -6.7% | -19.2% | 15.7% | 3.5% | -4.3% | -5.2% | 9.7% | -4.6% | -10.8% | 5.1% | -14.9% | -10.9% | -20.2% | -10.2% | -14.5% |
| StHs6_80-G | UoB | 20 + 15 | RSD% | 9.1% | 6.3% | 3.0% | 8.1% | 7.7% | 10.1% | 4.8% | 6.9% | 4.3% | 9.5% | 15.6% | 24.5% | 33.0% | 46.1% | 49.3% | 25.1% | 30.6% | 42.1% | 124.8% | 58.8% | 55.7% | 32.2% | 34.6% | 10.8% | 11.4% | 17.6% |
| StHs6_80-G | iCRAG TCD | 18 | mean (n = 19) | 31.0 | 490 | 10.5 | 112 | 6.84 | 313 | 11.9 | 26.2 | 3.04 | 12.9 | 2.81 | 0.931 | 2.41 | 2.05 | 1.12 | 1.08 | 2.73 | 0.403 | 2.20 | 1.01 | ||||||
| StHs6_80-G | iCRAG TCD | 18 | standard deviation | 1.58 | 18.32 | 0.73 | 5.39 | 0.35 | 14.35 | 0.74 | 1.74 | 0.14 | 0.43 | 0.20 | 0.05 | 0.15 | 0.19 | 0.11 | 0.12 | 0.21 | 0.04 | 0.15 | 0.09 | ||||||
| StHs6_80-G | iCRAG TCD | 18 | bias mean to preferred value% | 1.0% | 2% | -7.7% | -5% | -1.4% | 5% | -0.6% | 0.5% | -5.0% | -0.8% | 1.3% | -2.3% | -6.9% | -7.6% | -5.5% | -4.3% | -11.0% | -3.9% | -3.5% | -0.5% | ||||||
| StHs6_80-G | iCRAG TCD | 18 | relative std. deviation | 5.1% | 4% | 6.9% | 5% | 5.0% | 5% | 6.2% | 6.6% | 4.5% | 3.3% | 7.3% | 5.7% | 6.2% | 9.1% | 9.5% | 10.7% | 7.8% | 9.5% | 6.9% | 8.6% | ||||||
| bias% UoB to iCRAG TCD | -6.3% | -10% | -2.6% | -7% | -14.3% | -13% | -9.7% | -11.4% | -5.3% | -9.7% | -7.9% | -17.3% | 24.2% | 3.6% | 16.0% | -6.8% | -4.4% | -7.2% | -6.9% | -14.1% | |||||||||
| ATHO-G | Jochum et al., 2006 | preferred value | 12150 | 65.3 | 94.1 | 94.5 | 512 | 62.4 | 547 | 55.6 | 121 | 14.6 | 60.9 | 14.2 | 2.76 | 15.3 | 2.51 | 16.2 | 3.43 | 1.52 | 10.5 | 1.54 | 13.7 | 3.9 | 5.67 | 7.4 | 2.37 | ||
| ATHO-G | Jochum et al., 2006 | preferred value uncertainty | 214 | 3.0 | 2.7 | 3.5 | 20 | 2.6 | 16 | 1.5 | 4 | 0.4 | 2.0 | 0.4 | 0.10 | 0.7 | 0.08 | 0.7 | 0.11 | 0.5 | 0.07 | 0.4 | 0.05 | 0.5 | 0.2 | 0.62 | 0.3 | 0.12 | |
| ATHO-G | UoB | 20 + 15 | mean (n = 37) | 12445 | 63.2 | 91.6 | 86.5 | 468 | 55.4 | 525 | 52.4 | 116 | 13.9 | 57.4 | 13.6 | 2.64 | 14.8 | 2.36 | 15.3 | 3.29 | 9.7 | 1.49 | 10.1 | 1.47 | 12.8 | 3.4 | 5.1 | 7.0 | 2.20 |
| ATHO-G | UoB | 20 + 15 | std. deviation | 1677 | 2.8 | 2.7 | 3.2 | 23 | 2.3 | 19 | 1.7 | 3 | 0.6 | 3.5 | 1.4 | 0.33 | 2.2 | 0.23 | 1.6 | 0.31 | 1.5 | 0.19 | 1.0 | 0.17 | 1.8 | 0.3 | 0.5 | 0.4 | 0.20 |
| ATHO-G | UoB | 20 + 15 | bias mean to preferred value% | 2.4% | -3.2% | -2.6% | -8.5% | -8.7% | -11.2% | -4.0% | -5.7% | -3.9% | -4.5% | -5.7% | -4.5% | -4.5% | -3.1% | -5.8% | -5.3% | -4.0% | -5.5% | -1.8% | -4.2% | -4.7% | -6.9% | -13.8% | -9.2% | -5.7% | -7.1% |
| ATHO-G | UoB | 20 + 15 | relative std. deviation | 13% | 4% | 3% | 4% | 5% | 4% | 4% | 3% | 3% | 4% | 6% | 10% | 12% | 15% | 10% | 10% | 9% | 15% | 13% | 10% | 11% | 14% | 8% | 10% | 5% | 9% |
| ATHO-G | iCRAG TCD | 18 | mean (n = 20) | 66.0 | 97.0 | 88.3 | 495 | 61.0 | 570 | 56.2 | 125.0 | 14.9 | 62.3 | 14.7 | 2.70 | 14.2 | 16.2 | 9.7 | 10.1 | 12.8 | 3.9 | 7.38 | 2.36 | ||||||
| ATHO-G | iCRAG TCD | 18 | std. deviation | 3.2 | 6.2 | 7.1 | 31 | 2.2 | 35 | 3.9 | 7.9 | 0.9 | 3.6 | 1.2 | 0.18 | 1.1 | 1.2 | 0.9 | 0.8 | 1.2 | 0.3 | 0.52 | 0.11 | ||||||
| ATHO-G | iCRAG TCD | 18 | bias mean to preferred value% | 1.0% | 3.1% | -6.6% | -3% | -2.3% | 4% | 1.1% | 3% | 2.1% | 2.4% | 3.8% | -2.1% | -7.2% | -0.1% | -5.4% | -3.8% | -6.8% | -0.8% | -0.27% | -0.50% | ||||||
| ATHO-G | iCRAG TCD | 18 | relative std. deviation | 4.8% | 6.4% | 8.0% | 6% | 3.6% | 6% | 6.9% | 6% | 6.1% | 5.7% | 8.1% | 6.8% | 7.5% | 7.5% | 9.6% | 8.3% | 9.4% | 6.9% | 7% | 5% | ||||||
| bias% UoB to iCRAG TCD | -3.4% | -4.9% | 0.2% | -4.6% | -9.5% | -8.0% | -6.1% | -6.9% | -6.2% | -7.4% | -7.1% | -1.8% | 5.4% | -3.1% | 2.4% | 1.7% | 2.4% | -13.8% | -3.9% | -6.2% | |||||||||
The upper part of the table shows a comparison of secondary standard values measured using different spot sizes during analytical sessions at the University of Bonn (UoB). The mean values for measurements of ATHO-G57 and NIST61040 are given for analyses performed using 20 and 15 µm laser spot sizes and are compared with the recommended standard values. For each standard, the percentwise difference (bias%) between the 20 µm spot size relative to the 15 µm spot size results is given. The second part of the table shows a comparison of the general analytical performance of the LA-ICP-MS systems of the UoB and the iCRAG TCD laboratories based on results obtained for secondary standards ATHO-G and StHs6_80-G57. Individual laboratory results are compared with the respective recommended values and a percentwise difference (bias%) between the UoB results relative to the iCRAG TCD results is given.