Table 1 Analytical parameters for the analysis of the studied drugs by the proposed spectrophotometric method
Parameter (a) | Tizanidine(I) | Orphenadrine(II) |
|---|---|---|
Wavelength(nm) | 545 | 542 |
Concentration range(μg/mL) | 0.5-8 | 1-12 |
Limit of detection (LoD) (μg/mL) | 0.1 | 0.3 |
Limit of quantification(LoQ) (μg/mL) | 0.26 | 0.95 |
Correlation coefficient | 0.9999 | 0.9998 |
Slope | 0.12 | 0.09 |
Intercept | 0.11 | 0.032 |
S y/x | 5.43 × 10-3 | 0.013 |
S a | 3.2 × 10-3 | 8.84 × 10-3 |
S b | 7.06 × 10-4 | 1.29 × 10-3 |
RSD,% | 1.20 | 1.60 |
% Error | 0.45 | 0.64 |
ε (l/mol./cm.) | 4.26 × 104 | 4.63 × 104 |