7 days
Electrochemiluminescence immunoassay (ECLIA)
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Measures urinary C-peptide to assess endogenous insulin production over time.
24 hour urine
10 mL
Plastic urine container
Instruct the patient to void at 8 AM and discard the specimen
Collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning) in a 24-hour urine collection container. pH should be 4 to 7.
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 14 days |
| Freeze/thaw cycles | stable x3 |