Contribution to the Detection of Poor Quality Sildenafil Drugs in Burkina Faso Using High-Performance Thin-Layer Chromatography

Table 7

Precision data obtained with the polynomial function and the areas.

Concentration levels (mg/mL)	0.1125	0.3375	0.7875
Average found	0.1031	0.3509	0.7213
Repeatability standard deviation	0.004779	0.01253	0.06163
Intermediate fidelity standard deviation	0.01121	0.01508	0.07148
Repeatability coefficient of variation	4.632	3.571	8.544
Intermediate fidelity coefficient of variation	10.87	4.296	9.909