Sensitivies of urine screening and confirmation drug tests
At concentrations below the limit of detection, the drug (or metabolite) will not normally be detected by the usual screening procedure. A result reported as 'positive' in a screening test implies that the concentration of drug present is in excess of the limit given here. Note that the sensitivity of drug detection will be reduced in dilute urine specimens.
The action limits used by the laboratory for employment and pre-employment confirmatory tests cited above are the same as those used by most laboratories performing drugs of abuse screening, and conform to the Substance Abuse and Mental Health Services Administration (SAMHSA) guidelines. Please contact the laboratory for further information.
| DRUG CLASS | LIMIT OF DETECTION OF SCREENING TEST | LIMIT OF DETECTION OF CONFIRMATION TEST |
| Alcohol | 100 mg/L (10 mg/dL) | 100 mg/L (10 mg/dL) |
| Barbiturates | 200 µg/L | 200 µg/L |
| Amphetamine | 1000 µg/L | 200 µg/L |
| Benzodiazepines | 200 µg/L | 200 µg/L |
| Cannabinoids | 50 µg/L | 5 µg/L |
| Cocaine (metabolite) | 300 µg/L | 50 µg/L |
| Codeine | 300 µg/L | 50 µg/L |
| Cyclizine | 200 µg/L | 200 µg/L |
| Dihydrocodeine | 300 µg/L | 50 µg/L |
| EDDP | 100 µg/L | 50 µg/L |
| Methadone | 200 µg/L | |
| 6-Monoacetyl morphine | 10 µg/L | |
| Morphine | 300 µg/L | 50 µg/L |
| Thebaine | 50 µg/L |
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