Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (4) Sample Type Blood (1) Serum or Plasma (1) Urine (2) Test Area (-) Drugs of Abuse (4) Exposure (84) Other (1) Substance ID (1) Therapeutics (3) Test Category Alcohols (4) (-) Depressants (4) Hallucinogens (18) NPS/Designer Drugs (3) Stimulants (4) Volatiles (1) Test Sub-Category Benzodiazepines (1) Opiates/Opioids (3) Test Test Name 2041U Flunitrazepam and Metabolites, Urine 2276B Heroin Metabolites - Free (Unconjugated), Blood 2276SP Heroin Metabolites - Free (Unconjugated), Serum/Plasma 2276U Heroin Metabolites - Free (Unconjugated), Urine