Handheld device weeds out cannabis from hemp
Raman device that measures levels of tetrahydrocannabinol could be a useful tool for police and customs agents
Scientists in the US have found a new use for their handheld Raman spectrometer: it can determine whether a sample should legally be classified as cannabis. In the US, hemp can contain up to 0.3% tetrahydrocannabinol (THC) but above that concentration, it is considered cannabis. The device produces a chemical fingerprint that clearly indicates how much THC it contains.