Table 2.
Analytical and statistical parameters.
| 3 | 4 | 5 | 6 | |
|---|---|---|---|---|
| n | 28 | 28 | 28 | 28 |
| b | 3.7·10−2 | 5.0·10−3 | 4.0·10−2 | 2.7·10−2 |
| Sb | 7.2·10−4 | 1.1·10−5 | 4.9·10−4 | 5.3·10−4 |
| Sy/x | 1.2·10−2 | 6.2·10−3 | 3.5·10−3 | 9.5·10−3 |
| R2 (%) | 99.5 | 99.4 | 99.6 | 99.1 |
| PDW (%) | 10.1 | 7.2 | 96.0 | 15.3 |
| LOD (ng mL−1) | 1.0 | 4 | 0.3 | 1.0 |
| LOQ (ng mL−1) | 3.3 | 12 | 0.9 | 3.5 |
| LDR (ng mL−1) | 3.3–220 | 12–792 | 0.9–100 | 3.5–208 |
n: points of calibration; b: slope; Sb: slope standard deviation; Sy/x: regression standard deviation; R2: determination coefficient; %PDW: %P value of Durbin–Watson statistic; LOD: limit of detection; LOQ: limit of quantification; LDR: linear dynamic range.