Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (1) Gas Chromatography (GC) (8) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (12) Sample Type Blood (1) Test Area Exposure (1) Test Category Depressants (2) Drugs of Abuse (1) Gases (3) Industrial/Environmental Toxins (1) Muscle Relaxants (4) (-) Volatiles (1) Test Sub-Category Other (1) Test Test Name 1611B Tetrafluoroethane and Difluoroethane Panel, Blood