Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (22) Gas Chromatography (GC) (5) Gas Chromatography/Mass Spectrometry (GC/MS) (8) Headspace Gas Chromatography (GC) (38) Hematofluorometry (H) (1) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (11) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (2) Spectrophotometry (SP) (1) Sample Type (-) Blood (2) Serum or Plasma (1) Umbilical Cord (1) Urine (2) Test Area Drugs of Abuse (1) Exposure (1) Test Category Alcohols (1) Other (1) Test Sub-Category Biomarkers (1) Other (1) Test Test Name 3752B Phosphatidylethanol, Blood 8103B Environmental Exposure Screen, Blood