The authors have offered a technique of gas chromatography of orthomenthane hydrocarbons (orthocymene, ortho-1,4-menthadiene and ortho-1-menthene), growth stimulants of agricultural plants, in biological media. The technique has been tried in experiments on 64 albino rats. The method sensitivity has been found to be 1-2 micrograms/g. It has been established that CCl4 extracts 36-89% of orthomenthane hydrocarbons exhibiting marked tropism to the fatty tissue from organ and tissue homogenates. This permits using the fatty tissue as the test tissue for identification of the residual amounts of the stimulants in foods of animal origin.