Vitamin C (with Dilution)
Also known as: Ascorbic Acid, C, Vitamin
Use
Evaluation of vitamin C levels
Special Instructions
Please note that this test is intended for patients on high-dose vitamin C regimens, as results are expected to be higher than typical reference intervals. Ensure plasma specimens are shielded from light and processed promptly to prevent degradation.
Limitations
This test has been developed and its performance characteristics determined by Labcorp but has not been cleared or approved by the FDA. It is crucial to protect the specimen from light and separate plasma from cells immediately after collection to ensure result accuracy. Other anticoagulants besides lithium heparin may lead to sample rejection.
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 1903-4
- 1903-4
Result Turnaround Time
3-5 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
1 mL
Minimum Volume
0.5 mL
Container
Green-top (lithium heparin) tube; amber plastic transport tube with amber-top.
Collection Instructions
Collect blood by venipuncture into a green-top containing lithium heparin and mix immediately by gentle inversion at least six times. Plasma must be separated from cells immediately after venipuncture and transferred to light-protected amber plastic tube. Separated plasma must be placed on dry ice for shipment within 4 hours of separation.
Storage Instructions
Freeze immediately and protect from light.
Causes for Rejection
Anticoagulants other than lithium heparin; specimen not protected from light
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unstable |
| Refrigerated | Unstable |
| Frozen | 14 days |