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/Mass Spectrometry (GC/MS) (1) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Exposure (1) Test Category Acids (1) Test Sub-Category Benzodiazepines (3) (-) Carboxylic Acids (1) Diuretics (1) Opiates/Opioids (1) Other (2) Selective Serotonin Reuptake Inhibitors (SSRI) (3) Trace Elements (1) Test Test Name 2134U Formic Acid, Urine