Synonyms
- Ascorbic Acid
- C, Vitamin
Special Instructions
Please note that this test is to be used for patients on high-dose vitamin C (e.g., cancer therapy) in which results are expected to be very high relative to the reference interval.
|
Please note that this test is to be used for patients on high-dose vitamin C (e |
|
Please note that this test is to be used for patients on high-dose vitamin C (e.g., cancer therapy) in which results are expected to be very high relative to the reference interval. |
Expected Turnaround Time
3 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Plasma, frozen and protected from light
Volume
1 mL
Minimum Volume
0.5 mL (Note: This volume does not allow for repeat testing.)
Container
Green-top (lithium heparin) 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. 23594.
|
Green-top (lithium heparin) 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 Lab |
|
Green-top (lithium heparin) 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. 23594. |
Collection
Collect blood by venipuncture into a green-top containing lithium heparin and mix immediately by gentle inversion at least six times to ensure adequate mixing. 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. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Storage Instructions
Freeze immediately and protect from light.
Stability Requirements
| Temperature | Period |
|---|---|
| Room temperature | Unstable |
| Refrigerated | Unstable |
| Frozen | 14 days |
| Freeze/thaw cycles | Stable x1 |
Causes for Rejection
Anticoagulants other than lithium heparin; specimen not protected from light
Test Details
Use
This test is used for the evaluation of vitamin C levels.
|
|
|
This test is used for the evaluation of vitamin C levels. |
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
|
This test was developed and its performance characteristics determined by Lab |
|
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration. |
Methodology
Liquid chromatography-tandem mass spectrometry (LC/MS-MS)
Reference Interval
0.4–2.0 mg/dL
|
|
|
0.4–2.0 mg/dL |
LOINC® Map
© 2021 Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.
CPT Statement/Profile Statement
The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf