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Test ID: DMETH    
Drug of Abuse, Methadone Screen with GC-MS Confirmation, Urine

Method Description Describes how the test is performed and provides a method-specific reference

Urine is preliminarily screened for the presence of methadone by immunoassay technique. If the result is positive by this technique, the urine is subjected to gas chromatography/mass spectrometry analysis. If a compound chromatograph where a methadone standard emerges with a mass spectrum consistent with that of a specific methadone drug, the presence of that methadone drug is confirmed. (Schwarzhoff RH, Hubster EC, Liserio MK: Enzyme immunoassay, kinetic microparticle immunoassay, radioimmunoassay, and fluorscence polarization immunoassay compared for drugs-of-abuse screening. Clin Chem 39:2137-2146, 1993; Foerster EH, Dempse J, Garriott JC: A gas chromatographic screening procedure for acid and neutral drugs in blood. J Anal Toxicol 3:87-91, 1979)

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.

Monday through Friday, Sunday; Varies

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

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