Table T5. Detection limits and reproducibility of IAPSO seawater.
| Element | Unit | Detection limit |
IAPSO seawatermean value |
Standard deviation 1σ |
IAPSO analyses (N) |
|---|---|---|---|---|---|
| Mg | mg/L | — | 1293 | 7.19 | 6 |
| K | mg/L | — | 391 | 7.12 | 6 |
| Ca | mg/L | — | 396 | 3.32 | 6 |
| S | mg/L | — | 851 | 2.45 | 6 |
| Si | mg/L | — | 1.26 | 10.5 | 6 |
| Sr | mg/L | — | 7.63 | 6.90 | 6 |
| Li | µg/L | 0.83 | 172 | 1.14 | 3 |
| P | µg/L | 49.8 | 75.8 | 8.95 | 2 |
| Mn | µg/L | 17.7 | * | 4.32* | 3* |
| Fe | µg/L | 28.9 | * | 2.11* | 3* |
| Ba | µg/L | 3.75 | 88.9 | 5.08 | 3 |
Notes: Detection limit = blank mean + 3σ. Standard deviation 1σ is as a percent of the mean. — = not applicable, * = elements below detection in IAPSO seawater. Reproducibility is calculated from repeat analyses of the 50 ppb standard solution treated as unknowns.
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