| Parameters |
PCR(2)a |
PLS(2)b |
| |
Nifedipine |
Atenolol |
Nifedipine |
Atenolol |
| Root mean square errors |
|
|
|
|
| RMSEC |
0.13 |
0.71 |
0.13 |
0.70 |
| RMSECV |
0.15 |
0.93 |
0.15 |
0.92 |
| RMSEP |
0.13 |
0.36 |
0.13 |
0.36 |
| Regression parameters |
|
|
|
|
| Slope |
1.026 |
1.035 |
1.027 |
1.033 |
| Intercept |
-0.305 |
-0.601 |
-0.312 |
-0.577 |
| Correlation Coefficient (r ) |
0.9983 |
0.9980 |
0.9984 |
0.9980 |
|
| aThe number of PCR factors (PCs) are represented in parentheses, bThe number of PLS factors (LVs) are represented in parentheses. |
| Table 4: Root mean squared error of cross-validation (RMSECV), of calibration (RMSEC) and prediction (RMSEP), together with linear regression parameters of the linear
relationship between the expected and the predicted values of nifedipine and atenolol in the validation set by the proposed chemometric methods. |