Table 1.
Analytical data for the simultaneous determination of NF and TZ adopting the proposed method
| Parameters | NF | TZ |
|---|---|---|
| Concentration range (μg/mL) | 2-20 | 5-50 |
| Correlation coefficient (r) | 0.9999 | 0.9999 |
| Slope | -0.0378 | 0.0149 |
| Intercept | 0.0089 | 0.0093 |
| % RSD | 0.93 | 0.74 |
| % Er | 0.29 | 0.23 |
| Sy/x | 3.84 × 10-3 | 2.34 × 10-3 |
| Sa | 2.62 × 10-3 | 1.60 × 10-3 |
| Sb | 2.11 × 10-4 | 5.16 × 10-5 |
| LOD (μg/mL) | 0.23 | 0.36 |
| LOQ (μg/mL) | 0.70 | 1.08 |
LOD, limit of detection; LOQ, Limit of quantification; Sy/x, standard deviation of the residuals; Sa, standard deviation of the intercept; Sb, standard deviation of the slope; % RSD, relative standard deviation (% RSD=SD × 100/X where SD is the standard deviation and X is the mean recovery); % Er, percent error (% Er=RSD/√n where n is the number of values).