Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
Synonyms
B1; Thiamine
Specimen Type
Serum or Plasma
Performing Lab
Quest Diagnostics Valencia
Epic ID
LAB01544
Lab Test Days
Tuesday-Saturday
Standard TAT
2-3 Days
Collection Information
Specimen Required
2-4 mL Blood
Container Type
Lavender (EDTA)
Collection Instructions
Serum collected in a (red-top) tube is also acceptable. Overnight fasting is required. Protect from light.
Processing Information - Lab Use Only
Transport Temperature
Frozen-Only
Specimen Stability
Room Temp: 8 Hours; Refrigerated: 48 Hours; Frozen: 30 Days
Rejection Criteria
Received room temp; Received refrigerated; Hemolysis; Lipemia
Test Volume Required
2 mL Serum or Plasma
Minimum Test Volume
1 mL Serum or Plasma
Processing Instructions
Separate serum or plasma from cells within 4 hours of collection. Protect from light.
Comments
Quest only reports reference ranges on patients >17 years old.
CPT Codes
84425
Revised
07-24-19
Initials
SL