Test Number:701907, Cannabidiol (CBD)/Tetrahydrocannabinol (THC) Ratio, Urine Specimen Type: Urine (random) Methodology: Liquid chromatography/tandem mass spectrometry (LC/MS-MS) Use: To assist in distinguishing whether a positive urine THC test is exclusively the result of CBD use Volume: 30 mL Ordering: May be ...