Table 1: Optical characteristics and statistical data of the regression equations for ZVD and LVD with BCP.

ParameterLVDZVD

(nm)414414
Beer’s law limit (μg mL−1)b25–25050–300
Molar absorptivity (l mol−1 cm−1)3.68 × 1033.047 × 103
Sandell’s sensitivity (μg cm−2 per 0.001 absorbance unit)1.604 × 10−51.140 × 10−5
Regression equationa
 Slope ± SD0.0037 ± 0.000130.0036 ± 0.00026
 Intercept ± SD−0.0153 ± 0.0000540.0772 ± 0.000050
 Correlation coefficient, 0.99950.9997
 LOD (μg mL−1)0.106 0.217
 LOQ (μg mL−1)0.3520.722
 Intra-dayb0.650.54
 Inter-dayc0.870.71

(where is the concentration of drug in g mL−1).
bAverage of six determinations.
cResults of seven different days.