article_snippet: The findings come from LaFrate.
article_snippet: LaFrate will present the results of LaFrate research today at the national meeting of the American Chemical Society in Denver.
article_snippet: Andy LaFrate, the founder of Charas Scientific, knows that most people think it's a joke when LaFrate says LaFrate tested 600 samples of Colorado's legal pot .
article_snippet: In fact, LaFrate used highly accurate liquid chromatography to isolate all of the compounds within the marijuana samples - and got some surprising results .
article_snippet: LaFrate's tests used liquid chromatography, a highly accurate method of chemical analysis that separates out the component parts of a substance.
article_snippet: LaFrate says more testing is needed on the effects of contaminants on people who consume marijuana .
article_snippet: LaFrate says LaFrate found very small levels of genetic variation between 'strains' of marijuana.
article_snippet: Even more troubling were the 200 samples of marijuana concentrates - or pot extract - that LaFrate tested.
highlights_snippet: Findings come from Dr Andy LaFrate, who tested 600 marijuana samples with liquid chromatography .
  