HOMOVANILLIC ACID(HVA), RANDOM URINE
50 mL (10 mL min.) aliquot of random urine. Add 50% HCl drop by drop to bring the pH between 1–2. Do not use concentrated HCl. Ship refrigerated or frozen. Patient should strictly avoid L- Dopa at least 72 hours before and during collection.
High Performance Liquid Chromatography
Sample by Tue, Fri 1 pm
Report 4th Day Evening
Also see NEURONE SPECIFIC ENOLASE and VMA.