Table T13. Precision and accuracy of ICP-AES analyses on the JY-2000, Expedition 309.
| Standard: | BAS-206 (N = 18) | BAS-140 (N = 22) | ||||
|---|---|---|---|---|---|---|
| Average | RSD (%) |
Published value* |
Average | RSD (%) |
Published value† |
|
| Major element oxide (wt%): | ||||||
| SiO2 | 43.74 | 3.82 | 49.53 | 51.47 | 2.33 | 50.5 |
| TiO2 | 1.77 | 6.66 | 2.04 | 1.00 | 4.22 | 0.98 |
| Al2O3 | 12.7 | 1.08 | 14.22 | 14.64 | 1.25 | 14.6 |
| Fe2O3 | 13.05 | 2.76 | 14.30 | 11.23 | 1.36 | 11.1 |
| MgO | 0.24 | 14.45 | 0.22 | 0.19 | 1.43 | 8.15 |
| MnO | 6.00 | 1.87 | 6.77 | 8.21 | 1.11 | 0.19 |
| CaO | 8.77 | 1.97 | 9.70 | 12.54 | 1.25 | 12.4 |
| Na2O | 2.48 | 2.34 | 2.78 | 1.80 | 1.30 | 1.84 |
| K2O | 0.16 | 15.96 | 0.18 | BDL | 111.35 | 0.01 |
| P2O5 | 0.16 | 22.50 | 0.16 | 0.07 | 52.05 | 0.08 |
| Trace element (ppm): | ||||||
| Zn | 103.3 | 9.4 | NR | 75.6 | 11.2 | 80 |
| Co | 48.2 | 9.0 | NR | 48.8 | 9.9 | 55 |
| Ni | 36.4 | 37.9 | 53.5 | 81.4 | 5.1 | 85 |
| Sc | 41.8 | 6.8 | 47 | 35.3 | 2.9 | 43 |
| Cr | 72.0 | 42.4 | 83.7 | 182.5 | 2.7 | 186 |
| V | 407.9 | 2.4 | 461 | 332.8 | 1.7 | NR |
| Nb | — | — | — | 3.0 | 63.1 | 1 |
| Cu | 60.3 | 13.5 | NR | 78.4 | 3.0 | 81 |
| Zr | 117.3 | 3.3 | 127 | 49.2 | 2.4 | NR |
| Y | 43.8 | 1.9 | 43.8 | 28.3 | 2.2 | 24 |
| Sr | 101.6 | 1.6 | 112 | 53.0 | 5.3 | 44 |
| Ba | 41.0 | 6.5 | 49.9 | 2.0 | 5.8 | NR |
Notes: Standards analyzed as a check on precision and accuracy. Relative standard deviation (RSD) is calculated as the standard deviation of N analyses divided by the average value. For elements with near background concentrations, the relative standard deviation is artificially high (i.e., the actual precision is much better than suggested by the numbers). All values have been normalized to 100% volatile free. * = Leg 206 Shipboard Scientific Party (2003b), † = Sparks and Zuleger (1995). N = number of replicated analyses. BDL = below detection limit; NR = not reported, — = not analyzed.
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