Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (2) Sample Type Blood (1) (-) Serum or Plasma (1) (-) Urine (1) Test Area (-) Exposure (2) Test Category Acids (2) (-) Alcohols (2) Biomarkers (5) Depressants (1) Metals/Elements (28) Other (1) Pesticides/Insecticides (2) Solvents (5) Volatiles (5) Test Sub-Category Other (2) Test Test Name 4003SP Propylene Glycol, Serum/Plasma 4003U Propylene Glycol, Urine