Vitamin B1 Thiamine PlasmaSerum LCMSMS

Also listed as: Vitamin B<sub>1</sub> (Thiamine), Plasma/Serum, LC/MS/MS, Vitamin B1 (Thiamine), Plasma/Serum, LC/MS/MS
LOINC codes: 20468-5
Tests that measure Vitamin B1 Thiamine PlasmaSerum LCMSMS: Quest Diagnostics 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Vitamin B1 (Thiamine), Plasma/Serum, LC/MS/MS 90353

Population	Interval
Adult	8-30 nmol/L

Quest Diagnostics test catalog, 90353

Tests

Check the catalog code, specimen, method and preparation for every test that measures Vitamin B1 Thiamine PlasmaSerum LCMSMS. Select up to five tests to compare them side by side.

Quest Diagnostics 1 test

Single-analyte tests

Vitamin B1 (Thiamine), Plasma/Serum, LC/MS/MS 90353
Plasma · Fasting required · Turnaround Set up: Tues-Sat (8:00 a.m.); Report available: 2-3 days
Method and collection
Method
Chromatography/Mass Spectrometry
Preparation
Overnight fasting is required
Collection
⁠⁠⁠⁠⁠⁠⁠Plasma: Collect blood in a lavender-top tube. Remove plasma within 24 hours of collection and transfer to a light protected pour off tube. If separation of cells can't be performed immediately after collection, keep the whole blood refrigerated and protected from light. The separation of cells must be completed within 24 hours of collection. Separate cells by centrifugation at 2-8° C for 8-10 minutes. Transfer plasma to amber tube to protect from light and freeze tube immediately. Alternately, neutral colored tubes can be used if wrapped in aluminum foil. Ship frozen tubes at -10 to -30° C. Serum: Collect blood in plain red-top evacuated tube. Allow to clot at 20-25° C for 20-30 minutes. Centrifuge at 2-8° C for 8-10 minutes. Transfer serum to an amber polypropylene or polyethylene transport tube to protect from light and freeze tube immediately. Alternately, neutral colored polypropylene or polyethylene tubes can be used if wrapped in aluminum foil.
Quest Diagnostics catalog page

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Sources

Check the guidelines, studies and lab catalogs behind every range and link on this page. Open a source to see each claim it backs.

Lab catalogs

Quest Diagnostics test menu
Quest Diagnostics
- Test catalog: 1 tests, with codes, specimens, methods and reference intervals
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Codes and registries

LOINC 20468-5
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for Vitamin B1 Thiamine PlasmaSerum LCMSMS
Registered studies that measure Vitamin B1 Thiamine PlasmaSerum LCMSMS, on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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