ARUP's Laboratory Test Directory
| 0080380: Vitamin C, Plasma |
| Test Mnemonic: VIT C | |
|
Methodology: Spectrophotometry
Performed: Sun, Tue, Thu Reported: 1-7 days |
| Specimen Required: | |
|
Collect: One 10 mL green (sodium or lithium heparin). Centrifuge immediately. Follow transport instructions carefully.
Transport: 4 mL plasma, frozen. Add 2 mL heparinized plasma to each of the two collection tubes containing 40 mg oxalic acid (available through ARUP Client Services - ARUP Supply #16569). Mix and freeze. (Min: 2 ml) Adequate preservation is 20 mg oxalic acid to 1 mL plasma. Pediatric Collection/Transport: 1.5 mL plasma, frozen. Plasma must be added to transport tube containing 40 mg oxalic acid. Remarks: CRITICAL FROZEN. Separate samples must be submitted when multiple tests are ordered. The oxalic acid preservative may interfere with other tests. Fasting samples are preferred. Special collection tubes are available through ARUP Client Services. Unacceptable Conditions: Serum and hemolyzed plasma. Nonfrozen samples, and samples that are not preserved with oxalic acid. Stability: After separation from cells: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen (with oxalic acid preservative added): 2 months |
|
| Reference Interval: |
| 0.4-2.0 mg/dL |
| Note: | |
| Vitamin C concentrations between 0.2 and 0.4 mg/dL indicate risk of deficiency. Concentrations less than 0.2 mg/dL are consistent with deficiency. |
| CPT Code(s): | |
| 82180 |