Rapid Screening and Quantitative Determination of Illegal Phosphodiesterase Type 5 Inhibitors (PDE-5i) in Herbal Dietary Supplements

Figure 3

Comparison of the intensity of four representative PDE-5i after cleaning with three different solvents. (a) Acetildenafil. (b) Acetaminotadalafil. (c) Hydroxyvardenafil. (d) Avanafil.

(a)

(b)

(c)

(d)