Test name is listed first, with required preservative second. Recommended collection time period is 24 hours, except for pH. Sodium, potassium, creatinine, and urea nitrogen can be performed on any routine specimen, with or without preservative.
| Aldosterone | Refrigerate during 24 hr collection in plastic container. |
| Aminolevulinic Acid | Refrigerate during 24 hr collection. |
| Arsenic | Refrigerate during 24 hr collection in plastic container. |
| Cadmium | Refrigerate during 24 hr collection in plastic container. |
| Catecholamines, Fractionated | Refrigerate during 24 hr collection in plastic container. |
| Citric Acid | Refrigerate during 24 hr collection in plastic container. |
| Copper | Refrigerate during 24 hr collection in plastic container. |
| Cortisol, Urinary Free (HPLC) | Refrigerate during 24 hr collection in plastic container. |
| Cystine, Urine Quantitative | Refrigerate after random collection. |
| Histamine | Refrigerate during 24 hr collection in plastic container. |
| Homovanillic Acid | Refrigerate during 24 hr collection in plastic container; maintain refrigeration for submission. |
| Iodine, 24 Hour Urine | Aliquot sample into TWO ARUP metal free transport tubes (blue lid). |
| Lead | Refrigerate during 24 hr collection in plastic container. |
| Leukotriene E4 | Refrigerate during 24 hour collection in plastic container. |
| Mercury | Refrigerate during collection in plastic container. |
| Metanephrines Total | Refrigerate during 24 hr collection in plastic container. |
| Methylmalonic Acid | Refrigerate during collection in plastic container. |
| N-Telopeptide, Cross-Linked | Refrigerate during 24 hr collection in plastic container. |
| Oxalate | Patient should avoid ingestion of vitamin C prior to collection. |
| Porphobilinogen, Qualitative | Random urine collection in dark plastic container or wrap yellow round bottom tube in foil to shield from light, no preservative. |
| Porphyrins & Porphobilinogen | Refrigerate during 24 hr collection in dark plastic container. |
| Vanillylmandelic Acid | Refrigerate during 24 hr collection in plastic container. |