Test Overview
Colorimetric (Arsenazo III)
Evaluation of calcium metabolism
24 hour collections: varies with diet: 100 - 300 mg/24 hours.
Random urine collections are reported in units of mg/dL, for which reference values are not established.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
8 hours
Specimen Requirements
Random and 24 hour urine collections are acceptable.
Preferred specimen collection is in a plain container (NO preservatives).
Collect a timed 24-hour urine sample. Instruct the patient to void at 8:00am and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24 hour collection period, i.e., 8:00am the next morning. Refrigerate at 2-8C during and after collection. Container MUST be labeled with date and time collection started and finished. Screw the lid on securely, transport the specimen promptly to the laboratory. Any test requiring a 24 hr urine collection with no preservative may also be run on this specimen.
Specimens collected with glacial acetic acid or HCl preservative are acceptable. If collected in container with acid preservative, indicate on container and requisition: "Collected in Acid".
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.