Table 2.
Regression analysis results for determination of MET, LIN and EMP in using the proposed HPLC method. (a, intercept; b, slope; r, correlation coefficient; Sa, standard deviation of intercept; Sb, standard deviation of slope; Sy/x, residual standard deviation; LOD, limit of detection; LOQ, limit of quantitation.)
| parameters | MET | EMP | LIN |
|---|---|---|---|
| concentration range (µg ml−1) | 0.1–600 | 0.05–50 | 0.05–50 |
| R | 0.9999 | 0.9999 | 0.9999 |
| a | 0.077 | 0.085 | 0.198 |
| b | 0.387 | 0.330 | 0.923 |
| Sa | 0.005 | 0.002 | 0.005 |
| Sb | 2.329 × 10−5 | 8.700 × 10−5 | 2.61 × 10−4 |
| S(y/x) | 0.013 | 0.004 | 0.012 |
| LOD | 0.043 | 0.017 | 0.018 |
| LOQ | 0.130 | 0.051 | 0.054 |