Submit entire specimen
Screw cap plastic container (sterile)
Ambient - 3 days
Screen: Initial presumptive testing by Immunoassay (IA) at a testing threshold of 100 ng/mL
Confirmation: presumptive positives confirmed to limit of quantitation by definitive liquid chromatography/tandem mass spectrometry (LC/MS-MS)
A combined total of urine nicotine and cotinine (nicotine metabolite) concentrations > 200 ng/mL indicates active use of a nicotine-containing product (tobacco or smoking cessation product). Urine concentrations < 200 ng/mL could be consistent with passive exposure to tobacco smoke.