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) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type (-) Blood (1) Test Area Exposure (1) Test Category (-) Volatiles (1) Test Sub-Category (-) Other (1) Test Test Name 1611B Tetrafluoroethane and Difluoroethane Panel, Blood