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) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (38) (-) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (3) Sample Type Blood (1) Serum or Plasma (1) Urine (1) Test Area Exposure (3) Test Category Metals/Elements (3) Test Sub-Category (-) Toxic Elements (3) Trace Elements (2) Test Test Name 4190B Silicon, Blood 4190SP Silicon, Serum/Plasma 4190U Silicon, Urine