Urine Test Benzodiazepine

Updated

When taking lorazapam, or any other benzodiazepine, how accurate is a quantitive test, if done only once. For example, if one were to take, say, 10 mg of lorazapam, and then have a test done 10-12 hours later, would the quantitive test be reliable? If so, what would be the cut-off for accuracy on quantities taken in testing? What test would or can be used?Would it be gas chromatography/mass spectrometry (GC-MS) or liquid chromatography-tandem mass spectrometry (LC-MS/MS)? And lastly, what would be the variance % on time / Frequency/ quantity

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