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barbiturates in the urine

Name barbiturates in the urine
Specimen requirements 1 ml of urine
Collection instructions If possible, take first morning urine under supervision.
Procedure remarks Refrigerate before dispatch, and freeze for longer storage;
no additives;
detection time: 1 day to several weeks, depending on the active ingredient
Methodology FPIA (fluorescence polarisation immunoassay),
GC-MS (gas chromatography mass spectrometry) for confirmation
Reference ranges Cut-off: 200 ng/ml
Notes and interpretation The assay only provides a preliminary analytical test result. In particular, preliminary positive findings should be confirmed using a more specific method (e.g. GC-MS).
Remarks Testing currently takes place in a contract laboratory