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[DOC File]Beckman Coulter
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Four samples, shown by GC/MS to contain ranitidine but no amphetamines, correctly tested negative with the new reagent, whereas they previously tested false positive. Two samples testing negative with the new reagent, and positive with the current reagent, had …
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[DOC File]Reliability of urine drug screens: When should you consult ...
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If a physician suspects a false positive, the laboratory should be notified and the specimen should be sent for confirmatory testing. In the scenarios above, the laboratory, which performed the UDS using the EMIT II platform, was consulted. Confirmatory testing revealed that both urine drug screens were falsely positive.
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[DOC File]how to pass drug tests
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1.3 Positive (defined): 50 nanograms of THC metabolites per milliliter. defines a "presumptive positive" by NIDA certified labs. This value was. originally 20 ng/mL, but too many false positives resulted. So the level. was raised to 100 ng/mL to reduce false positives. As of January 1995, the
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[DOC File]Alcohol and Drug Test and Collective Bargaining
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False positive test results also occur when drug screens confuse similar chemical compounds. For example, codeine and Vicks Formula 44-M have been known to produce positive test results for heroin, Advil for marijuana, and Nyquil for amphetamines. These problems can be mitigated with proper medical review practices, but this depends heavily on ...
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[DOC File]Ironwood Wilson has to
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False/positive results . Amphetamines - Includes: _____, decongestants, medication for Parkinson’s . Cocaine: _____ can cross react with the following immunoassays : cocaine EIA but not cocaine FPIA. Marijuana: Sustiva can cross react with THC EIA Immunoassays can’t distinguish between smoked marijuana and Marinol. Opiates
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[DOC File]Prepared By
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For this reason, confirmation of preliminary positive results is always recommended. Methods historically used for detecting amphetamines in biological fluids include liquid chromatography, gas-liquid chromatography, fluorometry, microcrystallography, and enzyme immunoassay.5. INTENDED USE:
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[DOC File]10-144
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Amphetamines 500 pg/mg. ... For each survey, achieving an 80% accuracy rate with no false positives. (2) Perform satisfactorily for two of every three consecutive surveys. (3) For consecutive surveys, achieve an accuracy rate on each substance of 66 2/3 % with no false positives. ... In those instances where a false positive result was reported ...
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59A-24
a. Report no false positive drug identifications. b. Correctly screen 90% percent of the samples in each proficiency testing survey. c. Achieve a combined score of 90% percent for screening and confirmation testing. d. Correctly confirm 90% percent of the drug challenges for proficiency samples that screen as positive…
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[DOC File]Drugs-Forum Home | Drugs-Forum
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The following medications and substances may trigger a false positive response by the qualitative urine drug screen (DAU) for categories underlined below. This presumptive positive result becomes a false positive if, on confirmatory testing by the UDrugA (Gas Chromatography/Mass Spectrometry), the presence of this medication or substance is not ...
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[DOC File]Effective client abstinence monitoring via drug testing is ...
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AMPHETAMINES 500 or 1000 500 BARBITURATES 200 or 300 100 - 300 BENZODIAZEPINES 200 or 300 100 - 300 CANNABINOIDS 20 - 50 15 COCAINE METABOLITE 150 or 300 150 OPIATES ** 300 100 - 300 PHENCYCLIDINE (PCP) 25 25 ALCOHOL variable 10 mg/dL ** The federal opiates cutoff level of 2000 ng/mL is not recommended for abstinence monitoring programs.
false positive for methamphetamine

False positive for amphetamines