Table 1.
Method precision using 20 duplicate runs of quality controls (QCs).
| Precision (%RSD) (n = 20) | ||||
|---|---|---|---|---|
| Analyte | QC Sample | Mean | Repeatability (%) | Intermediate Precision (%) |
| Cr | Low Spike | 2.02 | 3.70 | 2.03 |
| High Spike | 15.1 | 2.58 | 2.04 | |
| Ni | Low Spike | 2.03 | 4.16 | 2.34 |
| High Spike | 14.7 | 1.47 | 1.16 | |
| Cu | Low Spike | 204 | 1.33 | 0.814 |
| High Spike | 1500 | 1.24 | 0.912 | |
| Zn | Low Spike | 101 | 2.22 | 1.32 |
| High Spike | 764 | 2.07 | 0.902 | |
| Cd | Low Spike | 10.0 | 1.86 | 0.953 |
| High Spike | 75 | 1.46 | 0.797 | |
| Sn | Low Spike | 10.1 | 1.62 | 0.875 |
| High Spike | 74.8 | 1.16 | 0.737 | |
| Pb | Low Spike | 9.98 | 1.38 | 0.841 |
| High Spike | 76.4 | 1.58 | 1.13 | |