Can THC occur in hemp seed oil ?
To the editors, We have been approached by a firm which exports hemp seed oil from Hungary, who told us that foreign police or customs officials using dogs had stopped one of their consignments as it was suspected of containing THC. They sent us a small sample of the consignment, with the request that we investigate the validity of the suspicion, since literature data indicate that hemp seed oil should not contain THC. Our working hypothesis was that the THC content could only be due to contamination of the oil with the seed tunic [bract]. 1) The cannabinoid content of our own samples of 2 year old hemp seed oil was determined. 2) The THC content of 99 % pure Kompolti oil samples containing leaf and tunic debris and, as a control, that of oil from a hemp variety with a high THC content (of the hashish type) were also determined. 3) Determinations were made of the THC content of hemp seed oil from the Kompolti and high THC control varieties, purified to 99.9 % and further cleaned manual
