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What can cause a GC-MS test to have a false positive for morphine?
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∙ 12y ago
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Can baby orajel cause a false positive for a drug test for cocaine?
Nope, lidocaine, and benzocaine will never provide cross reactivity on a cocaine EMIT assay, or GCMS.
What is elisa cutoff and gcms cutoff?
The absorbance level assumed to be the limit for positive samples
Is LC MS more reliable test for Newborn screening or is it GC MS?
LCMS (actually) LCMS/MS goes the half way for newborn screening. Its then the GCMS which comes for rescue. It clarifies the results given by LCMS and says with accuracy whether it is a positive or a negative case, against what was indicated in the LCMS screening. GCMS is mostly based on urine sample while LCMS needs blood spots. Thats where GCMS already scores a big point above LCMS. Further, GCMS "confirms" a disorder, while LCMS stops at "maybe". GCMS tests for a massive range of disorders while LCMS is limited to a few class of disorders. GCMS is the future of screening, while LCMS is the present of screening.
Will adderall test positive on a GCMS test?
Yes. Ritalin will definitely give you a positive ua for amphetamine
What would cause a urine test confirmed with GCMS to be positive for phenobarbital when you only take butalbital?
Butalbital and phenobarbital are both barbiturates. It's really hard to differentiate between the two so most labs just program their machines to report everything as "phenobarbital," which is the most common downer.
What is a GCMS?
gas chromatography mass selective detector
Do all drug screens to gcms test?
Generally no, confirmation gc/ms is run when initial test come positive or "non-negative". But some company (employee testing) pay for this test also.
Why do you use internal standards in GCMS?
For quantification of unknown analyte
How do you pass a 10-50 GCMS drug test?
Don't do drugs.
Can protonix cause a false positive for THC on 10 panel confirmation drug screen test?
The short answer is yes. I have been doing research on this subject, and have found several authoritative references to how protonix can cause a false positive for THC. One such reference ( http://www.dhss.mo.gov/NursingHomes/LTCBulletinSummer_2008.pdf ) , from the state of Missouri Department of Health and Senior Services, describes how a bunch of seniors in a nursing home (falsely) tested positive for THC, and they traced it back to protinix.Apparently the manufactures are aware of this. I found several references on the internet (search term: "protonix cannabis"). I would suggest you do your research more thoroughly.Furthermore, be aware, false positives seem to only happen in the urine screening test. The more accurate GCMS test does not capture false positives like the urine tests do. The standard protocols for testing say that if a (less accurate) urine tests comes up positive, the sample should automatically be tested by another more accurate means (most frequently the GCMS test). If this is done, the final result of the test should be negative (assuming there is really no THC in the person being tested).This is a revised answer to the question above. Many substances can cause false positives drug urinalysis test. I work at a hospital lab and these are the findings we have on file that may produce inaccurate drug test results so take head to these warnings and make sure your urine is clean before having a UA for employment, probation, etc...THC (Marijuana) false positives include but are not limited to : Over-the-Counter NSAIDS: Ibuprofen, Advil, Nuprin, Mediprin, Motrin, Bayer, Select Pain Relief Formula, Excedrin IB Caplets, Genpril, Haltran, Ibuprin, Midol 200, Pamprin, Trendar Cramp Relief Formula, Cramp End Tablets, Medipren, Rufin, Naproxen, Aleve, Keteoprofen, Orudis, Relafen, Voltaren, Over-theCounter Allergy Preparations, Sleep AIds, Anti-Nausea Medications containing promethazine: Phenergeb, Promethegan. Riboflavin (vitamin B-12) Dronabinol, Edecrin.The list of these medicines will not excuse you you from a false positive reading but if you do fail an UA, you may want to consider having another one taken assuming you are "clean) and without any of the above listed medicines in your system in the last few days.~good luck!
What is the average cost of a GCMS drug test?
From what ive read of them, they arent cheap, bordering from 100-300 dollars per gas spectrometer test. But they are VERY accuratee, and usually only used to confirm a positive reading on a preliminary test, such as a urine test.
What is momentum and write CGS and MKS units of momentum?
kg m s-1 in MKS gcms-1 in CGS
