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) (3) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type (-) Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Exposure (2) Test Category (-) Acids (2) Alcohols (2) Antianxiety (2) Antidepressants (2) Gases (1) Sedative/Hypnotics (3) Solvents (1) Volatiles (7) Test Sub-Category Carboxylic Acids (2) Test Test Name 2134B Formic Acid, Blood 2134U Formic Acid, Urine