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) (5) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (1) Test Area Exposure (1) Test Category Analgesics (3) Other (1) (-) Volatiles (1) Test Sub-Category Other (1) Test Test Name 1611B Tetrafluoroethane and Difluoroethane Panel, Blood