​24 hr urine in 15 mL 50% HCl

Minimum aliquot volume : 30 mL urine

​High Performance Liquid Chromatography

​≥20 yrs Metanephrine : 400 - 1500 nmol/day

≥20 yrs Normetanephrine : 600 - 1900 nmol/day

For subjects 19 yrs and below, results are expressed as per mmol creatinine (see individual tests)

​Mean = 7 days, Range: 3 – 11 days

​Monday - Friday

Instructions before sampling:

 Patient should abstain from the following at least 2 days prior to and during urine specimen collection:
- intake of food like chocolate, coffee, banana, food containing vanilla, citrus fruits and

- where medically possible, drugs such as aspirin, a-methyldopa ( Aldomat), buspirone, codeine, isoproterenol, mandelamine and metocloproamide. If the patient cannot be completely removed from a drug regimen, test result should be interpreted with appropriate judgement based on expected physiological response to these drugs.

Total 24-hour urine volume must be clearly indicated.