hope this isn't a repeat post ; the article is dated May/00 , from Today's Chemist, How Hot Is That Pepper?, subtitled ... Quantifying capsaicinoids with chromatography . http://pubs.acs.org/hotartcl/tcaw/00/may/dong.html the item is actually an enjoyable read, notwithstanding the title and lofty publication source. another interesting page at http://www.chemsoc.org/exemplarchem/entries/mbellringer/ regards peter g