Table T7. Average measured values and 3σ standard deviations for major elements determined on the Supermini (Rigaku) X-ray fluorescence spectrometer from a selection of standard samples, Expedition 348.
|
Major element oxide |
JB-1b | JSd-1 | ||||||
|---|---|---|---|---|---|---|---|---|
|
Reference value (100%) |
Measured value (average) |
SD (3σ) |
RSD (%) |
Reference value (100%) |
Measured value (average) |
SD (3σ) |
RSD (%) |
|
| Na2O | 2.687 | 2.678 | 0.154 | 1.900 | 2.815 | 2.807 | 0.167 | 2.000 |
| MgO | 8.318 | 8.475 | 0.123 | 0.500 | 1.872 | 1.809 | 0.058 | 1.100 |
| Al2O3 | 14.694 | 14.411 | 0.088 | 0.200 | 15.123 | 14.999 | 0.133 | 0.300 |
| SiO2 | 52.226 | 52.336 | 0.177 | 0.100 | 68.698 | 68.422 | 0.218 | 0.100 |
| P2O5 | 0.262 | 0.263 | 0.014 | 1.800 | 0.126 | 0.124 | 0.009 | 2.500 |
| K2O | 1.349 | 1.320 | 0.042 | 1.100 | 2.253 | 2.245 | 0.048 | 0.700 |
| CaO | 9.810 | 9.776 | 0.052 | 0.200 | 3.132 | 3.094 | 0.024 | 0.300 |
| TiO2 | 1.288 | 1.266 | 0.031 | 0.800 | 0.664 | 0.665 | 0.036 | 1.800 |
| MnO | 0.150 | 0.148 | 0.006 | 1.400 | 0.095 | 0.095 | 0.007 | 2.600 |
| Fe2O3 | 9.217 | 9.147 | 0.078 | 0.300 | 5.222 | 5.192 | 0.028 | 0.200 |
SD = standard deviation, RSD = relative standard deviation.
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