Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (2) (-) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (1) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Exposure (1) Test Category Metals/Elements (1) Test Sub-Category Biomarkers (1) Opiates/Opioids (2) Other (8) Selective Serotonin Reuptake Inhibitors (SSRI) (1) Stimulants (1) Synthetic Cannabinoids (2) (-) Toxic Elements (1) Test Test Name 4190U Silicon, Urine