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) (-) Enzymatic Assay (EZA) (2) Gas Chromatography (GC) (3) Gas Chromatography/Mass Spectrometry (GC/MS) (3) Headspace Gas Chromatography (GC) (12) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (3) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) Refractometer (REF) (2) Sample Type Fluid (1) Urine (1) Test Area Diagnostic Aids (2) Test Category Biomarkers (2) (-) Electrolytes (2) Test Sub-Category Small Molecule (2) Test Test Name 0645FL Bicarbonate, Fluid 0645U Bicarbonate, Urine