Metanephrines, Urine METU
|Method(s)||Quantitative High Performance Liquid Chromatography/ Tandem Mass Spectrometry|
|Collect||24-hour urine or random urine. Refrigerate during collection.|
4 mL aliquot from well mixed 24 hour or random collection at 2-8°C. (Min: 2.5 mL)
Thoroughly mix entire collection (24-hour or Random) in one container. Transfer a 4 mL aliquot tube (Min: 2.5 mL). A pH lower than 2 can cause assay interference. Record total volume and collection time interval on transport tube and test request form.
Specimen preservation can be extended to 1 month refrigerated by performing one of the following:
Ambient: Unacceptable; Refrigerated: 2 weeks (unpreserved), 1 month (preserved); Frozen: 1 month
|Preferred Specimen Collection Device(s)|