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Special Handling:
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5 mL from a 24-hour urine collection. Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children under 5 years old. Send specimen refrigerated in a plastic, 13-mL urine tube. Patients should not eat avocados, bananas, butternuts, cantaloupe, dates, eggplant, grapefruit, hickory nuts, honeydew melon, kiwifruit, melon, nuts, pecans, pineapple, plantains, plums, tomatoes, or walnuts, which are high in serotonin for 48 hours before or during collection. Certain medications, such as L-dopa, acetaminophen, salicylates, and cough syrup containing guaifenesin must also be avoided. 24-hour volume is required on request form for processing. Urine Preservative Collection Options: The addition of preservative or application of temperature controls must occur within 4 hours of completion of the collection. Preferred: 50% Acetic Acid; Acceptable: 6N HCl: (30 mL), Na(2)CO(3): (5 g), Toluene (30 mL), 6N HNO(3) (15 mL), Boric Acid (10 g), Thymol (10%)
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