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Assessment of accuracy of the NMR magnesium assay.
| Sample # | Spiked (µM) | Measured a (µM) | Recovered (µM) | % Recovery |
|---|---|---|---|---|
| 1 | 0 | 589.9 ± 12.8 b | -- | -- |
| 2 | 105.1 | 688.5 ± 12.6 | 98.6 | 93.8 |
| 3 | 304.9 | 883.0 ± 9.5 | 293.1 | 96.1 |
| 4 | 609.8 | 1156.4 ± 5.2 | 566.5 | 92.9 |
| 5 | 809.5 | 1330.0 ± 12.0 | 740.1 | 91.4 |
| 6 | 1009.3 | 1544.1 ± 9.8 | 954.2 | 94.5 |
| 7 | 1503.4 | 2003.6 ± 41.8 | 1413.8 | 94.0 |
| 8 | 2008.1 | 2479.1 ± 36.9 | 1889.3 | 94.1 |
# number. a mean of four replicates ± standard deviation (SD). b measured magnesium before spiking.
