Homovanillic Acid (HVA), Urine HVAU
|Method(s)||Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry|
|Collect||Random or 24-hour urine. 24-hour samples should be refrigerated during collection.|
4 mL aliquot from a well-mixed random or 24-hour collection at 2-8°C. Submit sample in a standardized transport tube (Min: 1 mL). Record 24-hour volume on tube.
|Stability||Ambient: Unacceptable; Refrigerated: 1 week; Frozen: 2 weeks|
|Notes||Refrigeration is the preferred method of preservation. Record total volume and collection time interval on transport tube and test request form.|
|Preferred Specimen Collection Device(s)|