The determination of drugs and their substitutes in human hairs

In recent years it has become possible to detect organic pharmaceuticals and drugs in a few milligrams of a person's hair, using modern analytical methods (RIA, GC/MS, GC), whether this person has taken narcotics and other drugs in past times. With the aid of hair analysis it is possible to examine the drug career of a drug addict for up to 1 year, and sometimes for a longer time. This is mostly of great importance in criminalistics and forensic medicine, in the criminal retrospective examination of addicts.