The method was validated in accordance with the appropriate guideline of the International Conferenceon Harmonization (ICH) in terms of specificity, selectivity, precision, linearity, limit of quantitation, limitof detection, accuracy, robustness and stability, and was successfully applied to the analysis of naturaldietary supplements and herbal remedies with an indication for enhanced male sexual potency. Theproposed method offers a cheap and simple alternative to LC–MS screening used by control laboratoriesfor routine analysis of suspicious products.