Colorimetric (Arsenazo III)
Evaluation of calcium metabolism
Varies with diet: 100 - 300 mg/24 hours (2.50-7.50 mmol/24 hours). Random urine collections are reported in units of mg/dL, for which reference values are not established.
Collect 24 hour urine specimen with no preservative. Aliquot 5 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.