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Beating a Drug Test, Beat a Drug Test and Accuracy in Drug Testing New Drug Testing Strips
December 12, 2002 Sample testing should only be done by FUDT certified laboratories. FUDT (Forensic Urine Drug Testing) certification means that the lab is subject to annual peer review and quarterly independent proficiency testing to confirm the accuracy and reliability of the testing.

There are two national certification agencies - SAMSHA and CAP (College of American Pathologists). Collection sources that offer "rapid tests" usually are not qualified toxicologists and do not fully understand the limitations of drug testing and could be providing poor quality or misleading information.

The SAMSHA Mandatory Guidelines require laboratories to have a Standard Operating Procedure (SOP) manual that includes a complete description of each the laboratory's chain-of-custody methods, analytical testing methods, quality control programs, equipment and maintenance, access and security, and employee qualifications.

SAMSHA Cutoff Levels for Urine Drug Tests

Initial Test Cutoff Concentration

(ng/mL)

Marijuana metabolites.......... 50

Cocaine metabolites.............150

Opiate metabolites ¹............ 2000

Phencyclidine...................... 25

Amphetamines ².................. 500

¹ Labs are permitted to initial test all specimens for 6-AM using a 10 ng/mL cutoff

² d-Methamphetamine is the target analyte and test kit must cross-react with MDMA, MDA, and MDEA (~ 50 to150% cross-reactivity)

Confirmatory Test Cutoff Concentration

(ng/mL) Marijuana metabolite¹............... 15

Cocaine metabolite².................. 100

Opiates

Morphine............................... 2000

Codeine................................. 2000

6-acetylmorphine ³................. 10

Phencyclidine.......................... 25

Amphetamines

Amphetamine..................... 250

Methamphetamine ⁴ ............ 250

MDMA............................... 250

MDA.................................. 250

MDEA................................ 250

¹ Delta-9-tetrahydrocannabinol-9-carboxylic acid

² Benzoylecgonine

³ If a laboratory uses both initial test kits to screen a specimen concurrently, it may report 6-AM alone

⁴ Specimen must also contain d-Amphetamine at a concentration > 100 ng/mL

FUDT certified laboratories are able to provide 100% accurate "POSITIVE." The LIMIT OF DETECTION - or the established cut off levels of the analysis - limit "Negative" tests. The most reliable "negative" test results are those which are determined by a ZERO TOLERANCE testing method.

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