Urine Tests Requiring Preservatives, Refrigeration or Special Containers (Grouped by Requirements)

Test name is listed first, with required preservative second. Recommended collection time period is 24 hours, except for pH and bicarbonate. Sodium, potassium, creatinine, and urea nitrogen can be performed on any routine specimen, with or without preservative.

Patient should avoid ingestion of vitamin C prior to collection.Oxalate
Random urine collection in dark plastic container or wrap yellow round bottom tube in foil to shield from light, no preservative.Porphobilinogen, Qualitative
Refrigerate after random collection.Cystine, Urine Quantitative
Refrigerate during 24 hour collection in plastic container.Leukotriene E4
Refrigerate during 24 hr collection in dark plastic container.Porphyrins & Porphobilinogen
Refrigerate during 24 hr collection in plastic container.Aldosterone
Catecholamines, Fractionated
Citric Acid
Cortisol, Urinary Free (HPLC)
Iodine, 24 Hour Urine
Metanephrines Total
N-Telopeptide, Cross-Linked
Vanillylmandelic Acid
Refrigerate during 24 hr collection in plastic container; maintain refrigeration for submission.Homovanillic Acid
Refrigerate during 24 hr collection.Aminolevulinic Acid
Refrigerate during collection in plastic container.Mercury
Methylmalonic Acid

Thu Jan 3 11:26:10 2019