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 Depressants (1) Test Sub-Category Barbiturates (4) Organochlorides (2) Other (6) Phenothiazines (3) (-) Sedative-Hypnotics (1) Tricyclic (2) Test Test Name 4640B Trichloroethanol - Free, Blood