Simultaneous quantification of urea, uric acid, and creatinine in human urine by liquid chromatography/mass spectrometry.

In forensic analysis, the identification of urine or human urine among unknown liquids plays an important role. Urea, uric acid, and creatinine are major organic compounds found in human urine. Previous studies have reported that the concentration quotients of these three compounds can be used as an index for the identification of human urine.

Development of a dual test procedure for DNA typing and methamphetamine detection using a trace amount of stimulant-containing blood.

Investigation of drug-related crimes, such as violation of the Stimulant Drug Control Law, requires identifying the used drug (mainly stimulant drugs, methamphetamine hydrochloride) from a drug solution and the DNA type of the drug user from a trace of blood left in the syringe used to inject the drug. In current standard test procedures, DNA typing and methamphetamine detection are performed as independent tests that use two separate portions of a precious sample. The sample can be entirely used up by either analysis.