Collect 2 mL urine in a preservative-free plastic container.
Stability (collection to shipping of the sample):
- Ambient: Unacceptable
- Refrigerated: Unacceptable
- Frozen (-20 º C): 6 months
- CRITICAL FROZEN: Seperate specimens must be submitted when multiple tests are ordered.
- Exposure to repeated freeze/thaw cycles
- 6-Acetylmorphine (heroin metabolite)
Liquid chromatography tandem mass spectrometry (LC-MS/MS)
1 - 3 days
Range of Quantitation: 10 – 1,000 ng/mL