Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (1) Sample Type (-) Blood (1) Serum or Plasma (1) Test Area (-) Exposure (1) Test Category Acids (1) Biomarkers (2) (-) Depressants (1) Metals/Elements (6) Other (1) Solvents (2) Terpenes (1) Volatiles (4) Test Sub-Category Sedative-Hypnotics (1) Test Test Name 4640B Trichloroethanol - Free, Blood