Determination of trans-resveratrol in <i>Solanum americanum</i> Mill. by HPLC

<p><i>Solanum americanum</i> Mill. is a plant that belongs to the Solanaceae family, its respective ripe fruit is dark purple. Ripe <i>S. americanum</i> Mill<i>.</i> fruits were submitted to physicochemical characterisation, and their <i>trans</i>-resveratrol contents were quantified by high-performance liquid chromatography. Such determination was executed with fruits at different stages of ripeness and freeze-stored fruits as well. <i>In natura</i> ripe fruit pulp and peel presented average <i>trans</i>-resveratrol amounts of 1.07 and 0.7960 μg <i>per</i> gram of sample, respectively. These amounts are significantly higher when compared to freeze-stored fruit (0.1353 μg of <i>trans</i>-resveratrol <i>per</i> gram of sample) and to other berries. All ripe fruits showed significant amounts of total anthocyanins and total antioxidants. Thus, for the first time, <i>trans</i>-resveratrol has been identified and quantified in <i>S. americanum</i> Mill<i>.</i> fruit samples.</p>