Table 1. Limits of detection, background quotas and cellular phosphorus quotas of Thalassiosira pseudonana as measured by SXRF.
‘Run date’ refers to the date when the cells were analyzed by SXRF. The P quotas (mol P cell−1) are arithmetic means.
| Run date | Grid type | n | Limit of detection (µg cm−2) | Limit of detection (mol cell−1) | P quota in background (µg cm−2) | P quota in background (mol cell−1) | P quota (mol cell−1) | Standard deviation |
|---|---|---|---|---|---|---|---|---|
| Nov 2007 | Au | 20 | 4.4 × 10−2 | 5.6 × 10−16 | 1.7 × 10−2 | 2.0 × 10−16 | 4.0 × 10−15 | 1.5 × 10−15 |
| Nov 2007 | Ni | 21 | 7.5 × 10−3 | 8.7 × 10−17 | 5.9 × 10−3 | 5.9 × 10−17 | 3.8 × 10−15 | 1.2 × 10−15 |
| Apr 2008 | Nylon | 7 | 2.3 × 10−3 | 2.7 × 10−17 | 4.4 × 10−3 | 3.3 × 10−17 | 3.4 × 10−15 | 1.6 × 10−15 |