pharmaceuticals Cdet ± µ mg/L Recovery, % RSD intra-day % RSD inter-days %
System I
  Diphergan 10.04 ± 0.05 100.4 0.52 1.42
20.07 ± 0.32 100.3 1.28 1.32
29.98 ± 0.13 99.93 0.72 0.95
Thioridazin 10.02 ± 0.13 100.2 1.15 1.11
19.95 ± 0.10 99.75 0.67 0.83
29.93 ± 0.12 99.77 0.34 0.56
Fenactil 9.91 ± 0.05 99.10 0.74 0.98
19.89 ± 0.08 99.45 0.69 0.57
29.94 ± 0.14 99.80 0.53 0.43
System II
Diphergan 10.12 ± 0.08 101.2 0.58 0.68
20.07 ± 0.09 100.3 0.51 0.49
30.02 ± 0.16 100.1 0.49 0.75
Thioridazin 10.13 ± 0.07 101.3 0.67 0.92
20.17 ± 0.07 100.8 0.38 0.67
30.20 ± 0.10 100.7 0.34 0.36
Fenactil 10.10 ± 0.05 101.0 0.52 0.46
20.16 ± 0.08 100.8 0.73 0.95
30.22 ± 0.07 100.7 0.46 0.42
System III
Diphergan 9.87 ± 0.07 98.70 0.68 0.79
19.68 ± 0.13 98.40 0.70 0.82
29.58 ± 0.13 98.60 0.46 0.44
Thioridazin 9.85 ± 0.10 98.50 0.98 0.92
19.66 ± 0.15 98.30 0.87 0.32
29.60 ± 0.10 98.67 0.72 0.61
Fenactil 9.65 ± 0.20 96.50 1.56 1.24
19.56 ± 0.22 97.80 0.94 1.04
29.65 ± 0.32 98.83 0.94 0.99
Where: - Confidence limit, p=95%; RSD - relative standard deviation.
Table 3: Determination of active substances in pharmaceuticals.