Testing Laboratory
Auckland Te Toka Tumai | Auckland HospitalDepartment
Chemical Pathology
Delphic Registration Code (Alpha Code)
FADH
Test Code (Numeric Code)
4093
Laboratory Handling
Phlebotomy
Sample must be protected from light. Blood should be taken at least 8 hours after supplementation, ideally after a period of fasting.
Transport
Sample must be protected from light.
Separating
Do not separate.
Sample Stability
See additional information
Synonyms
Riboflavin
Turnaround Time
1 week
This test may be vetted by a pathologist. The clinical information for the test must be clearly written on the request form. If clinical information is not provided, or does not provide sufficient justification for the test, the test may be declined. Declined tests : If a test is declined, the specimen will be held for a reasonable period (usually 3 weeks but dependant on the stability of the sample). Medical practitioners seeking approval for a declined test should email the on-call Chemical Pathologist ( chemicalpathologist@adhb.govt.nz ) , giving the patient's name and NHI number and the clinical justification for the test. If unable to email, call the on-call Chemical Pathologist via Lablink (09-3078995) and identify yourself as a doctor. Test vetting policy
Specimen Type
- Whole Blood
Specimen Requirements
Tube/Container Type:
Preferred
- EDTA (Lavender Cap)
Preferred Sample Volume (ml)
4
Paediatric Specimen Requirements
Tube/Container Type:
Preferred
- EDTA (Microtainer)
Acceptable
- EDTA (Lavender Cap)
Minimum Sample Volume (ml)
1
Pre-testing Requirements
Blood should be taken at least 8 hours after supplementation, ideally after a period of fasting.
Additional Specimen Information
4 mL Adult EDTA Whole Blood (Always Required)
If Vitamin B6 is also required then two tubes should be collected.
Micro-EDTA1 mL Paediatric Micro-EDTA Whole Blood (Always Required)
Last updated: 12/03/2026