Web: | mayocliniclabs.com |
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Email: | mcl@mayo.edu |
Telephone: | 800-533-1710 |
International: | +1 855-379-3115 |
Values are valid only on day of printing. |
Total Cortisol:
Deuterated cortisol (d4-cortisol) is added to each specimen as an internal standard. Cortisol and d4-cortisol are extracted from the samples and analyzed by liquid chromatography-tandem mass spectrometry using multiple reaction monitoring. A calibration curve is included with each batch of patient samples.(Taylor RL, Machacek D, Singh RJ: Validation of a high-throughput liquid chromatography-tandem mass spectrometry method for urinary cortisol and cortisone. Clin Chem 2002;1511-1519)
Free Cortisol:
Deuterated cortisol (d3-cortisol) is added as an internal standard and analyzed by mass spectrometry.(Unpublished Mayo method)
CINP: Monday through Friday; 4 p.m.
CORTF: Tuesday, Thursday, Friday