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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.
Urine drug test results can be attributed to human error and urine sample contamination. In addition, there are a number of controlled and uncontrolled substances that will cause a false positive result; these are some of the reasons why labs will immediately split your urine drug test specimen into two samples.ational laboratories state that the EMIT test is wrong 25% to 30% of the time, and can result in false during a urine drug test positives from legal substances up to 38% of the time!