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| Test Name: | Vitamin C, Serum |
|---|---|
| Test Code: | 001479 |
| Other Names: | N/A |
| Test Includes: | Vitamin C |
| Specimen Requirements: | Serum, FROZEN and PROTECTED FROM LIGHT, 1 mL |
| Container: | Red-top tube or gel-barrier tube; amber plastic transport tube with amber-top. (If amber tubes are unavailable, cover standard transport tube completely, top and bottom, with aluminum foil. Identify specimen with patient name directly on the container and on the outside of the aluminum foil. Secure with tape.) For amber plastic transport tube and amber-top, order LabCorp No. 23598. |
| Collection Instructions: | Draw in chilled tube. Separate serum from cells as soon as possible following collection. Keep specimen on ice. Transfer specimen to a plastic transport tube before freezing. Protect specimen from light. To avoid delays in turnaround time when requesting multiple tests on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED. |
| Stability: | FREEZE IMMEDIATELY and protect from light. Stable for five days at -30(degrees)C and one month at -70(degrees)C. There is a 61% decrease in levels in the first 24 hours following collection if the sample is allowed to remain at room temperature. |
| Rejection Criteria / Special Instructions: | Order Vitamin C (With Dilution) [123253] if sending specimens from patients on high-dose vitamin C (eg, cancer therapy) in which results are expected to be significantly above the reference interval. |
| Methodology: | High-pressure liquid chromatography (HPLC) with electrochemical (EC) detection |