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Test Catalog

Test ID: 2HCAP    
Calcium Excretion, 2-Hour Collection, Fasting, Urine

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Collection Container/Tube: Plastic urine container

Submission Container/Tube: Plastic, 6-mL tube (Supply T465)

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a 2-hour urine specimen.

2. Add 2 mL of 6N HCl as preservative at start of collection.

3. Instructions for 2-hour urine collection are as follows:

a. No food or drink after 6 p.m. the evening before the test (except as indicated by physician).

b. On the day of the test, do not void after 8 a.m.

c. At precisely 10 a.m., void (empty bladder). Discard urine.

d. Drink 2 glasses of water (1 at 10 a.m. and 1 at 11 a.m.). This must be deionized or distilled water.

e. Void (empty bladder) precisely at 12 noon.

f. Save all of urine voided at 12 noon in container provided.

Additional Information: 2-Hour volume is required.

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

2 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected









Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
UrineFrozen (preferred)7 days
 Refrigerated 7 days