Extraction and quantification of toxins from Karwinskia humboldtiana (tullidora).

There is no mention in the literature of any analytical method to quantify toxins present in fruits of Karwinskia humboldtiana. It is recommended that thin layer chromatography and densitometry in situ be used, since it is rapid, sensitive and specific. Great variations in the toxin content of fruits collected in different regions of the state of Nuevo Leon (Mexico) were found, showing the importance of applying an analytical method before beginning toxicological experiments.