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) (10) Gas Chromatography (GC) (25) Headspace Gas Chromatography (GC) (5) Hematofluorometry (H) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (60) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (3) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (22) (-) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (2) Spectrophotometry (SP) (1) Sample Type (-) Blood (1) Hair (1) Nails (1) Serum or Plasma (1) (-) Urine (1) Test Area Test Category Test Sub-Category Test Test Name 4190B Silicon, Blood 4190U Silicon, Urine