Table 3 Intra- and inter- day precisions for the analysis of SOF and SMV in three laboratory mixtures by the proposed methods
Concentration (μg mL−1) | % Recoverya ± RSD | ||||
|---|---|---|---|---|---|
Intra-day precision | Inter-day precision | ||||
SMV | SOF | SMV# | SOF | SMV# | SOF |
iso-absorptive point method | |||||
7.5 | 20.0 | 100.39 ± 1.33 | 100.75 ± 1.13 | 100.18 ± 2.60 | 99.61 ± 2.44 |
10.0 | 20.0 | 99.90 ± 1.06 | 102.37 ± 2.00 | 102.81 ± 1.47 | 102.70 ± 0.53 |
20.0 | 10.0 | 102.39 ± 1.91 | 100.92 ± 0.96 | 99.83 ± 1.52 | 100.99 ± 2.00 |
Ratio subtraction method | |||||
7.5 | 20.0 | 98.66 ± 0.75 | 101.88 ± 1.63 | 100.97 ± 1.15 | 99.32 ± 1.65 |
10.0 | 20.0 | 101.03 ± 1.07 | 100.27 ± 0.69 | 100.85 ± 1.67 | 101.64 ± 0.98 |
20.0 | 10.0 | 100.92 ± 1.45 | 99.75 ± 1.48 | 99.47 ± 0.85 | 102.45 ± 1.37 |
Dual wavelength method | |||||
7.5 | 20.0 | 100.93 ± 0.65 | 102.42 ± 0.99 | 100.36 ± 1.26 | 99.32 ± 1.95 |
10.0 | 20.0 | 97.67 ± 1.17 | 100.83 ± 1.85 | 97.50 ± 1.17 | 99.64 ± 0.78 |
20.0 | 10.0 | 98.54 ± 1.83 | 100.26 ± 1.42 | 101.97 ± 1.59 | 102.53 ± 1.07 |