To test drivers for alcohol consumption, we have the breathalyzer. It鈥檚 fast, reliable, portable and inexpensive, but it will not work for cannabis.
The idea of a mechanism to measure the alcohol a person has consumed dates back quite far.
The term 鈥渁lcohol鈥 to a chemist聽 means an organic compound that contains an OH group, but as far as the public is concerned 鈥渁lcohol鈥 refers to one specific compound, namely, ethanol. It is ethanol...