As the sample was heated, the dimethyl sulphone sublimated, leaving behind the methamphetamine hydrochloride or amphetamine hydrochloride. In order to isolate the controlled substances from the dimethyl sulphone, therefore, the sample was heated in a convection oven for 10 minutes at a temperature of 115☌.
It is frequently the case that samples of methamphetamine hydrochloride or amphetamine hydrochloride are mixed exclusively with dimethyl sulphone. The Use of Heat to Eliminate Dimethyl Sulfone from Amphetamine and Methamphetamine Hydrochloride
