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For the pain management panel only, regardless of the screen results, GC/MS confirmation for the following drugs are completed and reported individually as positive/negative with a detection limit of 100 ng/mL: morphine, codeine, oxycodone, oxymorphone, hydrocodone, hydromorphone.
In contrast to the rapid excretion of ethylmorphine and codeine, pholcodine showed positive results for opiates 2â6 weeks after intake when the urines were analysed with the RIA-method. When analysed with the EMIT-method, positive results were obtained for pholcodine for approximately 10 days.