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Accuracy of national certified reference materials (CRMs) determination (3.0% NaCl as the matrix).
| Certified reference material | Dilution factor | Standard value (mg·L−1) | Measured value (μg·L−1) | RE % |
|---|---|---|---|---|
| GNM-M263963-2013 | 2000 | Rb: 10 ± 0.2 | Rb: 5.08 ± 0.4 | 1.6% |
| Cs: 10 ± 0.2 | Cs: 4.96 ± 0.3 | 0.7% | ||
| GNM-M022139-2013 | 2000 | Rb: 100 ± 1.4 | Rb: 53.2 ± 2.0 | 4.5% |
| Cs: 100 ± 1.4 | Cs: 52.4 ± 2.0 | 4.6% |
