- P-ISSN 1225-0163
- E-ISSN 2288-8985
The rapid and sensitive determination method of sildenafil and its related compounds (Vardenafil, Homosildenafil, Tadanafil.) has been investigated using high performance thin layer choromatography (HPTLC). Optimizing separation conditions and simultaneous determination method of these compounds were studied. The calibration curves of those compounds at 254 nm was found to be linear in the range of <TEX>$1.0{\sim}56.5{\mu}g/mL$</TEX>, respectively. The detection limts (LOD) and quantification limits (LOQ) of these were found to be <TEX>$0.8{\sim}1.8{\mu}g/mL$</TEX> and <TEX>$1.0{\sim}2.3{\mu}g/mL$</TEX>. The coefficient of variation (C.V.) were less than 2.5%. Finally, the present method was applied to determine sildenafil and its related substances in dietary supplement.