Test ID: VITB2
Riboflavin (Vitamin B2), Plasma
Method Description 
Describes how the test is performed and provides a method-specific reference
The stable isotope riboflavin 13C15N2 is added to plasma as an internal standard. Meta-phosphoric acid solution is then added to precipitate the proteins. Following sedimentation of the proteins, an aliquot of the clarified supernatant fluid is subjected to separation of riboflavin and internal standard from other plasma components by reverse-phase HPLC with quantitation by tandem mass spectrometry (LC-MS/MS).(Unpublished Mayo methods)
Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.
Tuesday, Thursday
Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.
2 days (not reported on Saturday or Sunday)
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
4 days
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
2 weeks
Performing Laboratory Location The location of the laboratory that performs the test
New England
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